diff --git a/lib/class-wp-theme-json-resolver.php b/lib/class-wp-theme-json-resolver.php
index 7719dbf9ddf15d..15902895b1e1d7 100644
--- a/lib/class-wp-theme-json-resolver.php
+++ b/lib/class-wp-theme-json-resolver.php
@@ -205,7 +205,7 @@ private static function translate( $theme_json, $domain = 'default' ) {
 	 *
 	 * @return WP_Theme_JSON Entity that holds core data.
 	 */
-	public static function get_core_data() {
+	private static function get_core_data() {
 		if ( null !== self::$core ) {
 			return self::$core;
 		}
@@ -310,6 +310,122 @@ public static function get_theme_data( $theme_support_data = array() ) {
 		return $with_theme_supports;
 	}
 
+	/**
+	 * Returns the editor settings.
+	 *
+	 * @param array $theme_support_data Existing block editor settings.
+	 *                                  Empty array by default.
+	 *
+	 * @return array
+	 */
+	public static function get_settings( $theme_support_data = array() ) {
+		$tree = WP_Theme_JSON_Resolver::get_merged_data( $theme_support_data, 'theme' );
+		return $tree->get( array( 'settings' ) );
+	}
+
+	/**
+	 * Takes a tree adhering to the theme.json schema and generates
+	 * the corresponding stylesheet.
+	 *
+	 * @param WP_Theme_JSON $tree Input tree.
+	 * @param string        $type Type of stylesheet we want accepts 'all', 'block_styles', and 'css_variables'.
+	 *
+	 * @return string Stylesheet.
+	 */
+	private static function tree_to_styles( $tree, $type = 'all' ) {
+		// Check if we can use cached.
+		$can_use_cached = (
+			( 'all' === $type ) &&
+			( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) &&
+			( ! defined( 'SCRIPT_DEBUG' ) || ! SCRIPT_DEBUG ) &&
+			( ! defined( 'REST_REQUEST' ) || ! REST_REQUEST ) &&
+			! is_admin()
+		);
+
+		if ( $can_use_cached ) {
+			// Check if we have the styles already cached.
+			$cached = get_transient( 'global_styles' );
+			if ( $cached ) {
+				return $cached;
+			}
+		}
+
+		$stylesheet = $tree->get_stylesheet( $type );
+
+		if ( ( 'all' === $type || 'block_styles' === $type ) && WP_Theme_JSON_Resolver::theme_has_support() ) {
+			// To support all themes, we added in the block-library stylesheet
+			// a style rule such as .has-link-color a { color: var(--wp--style--color--link, #00e); }
+			// so that existing link colors themes used didn't break.
+			// We add this here to make it work for themes that opt-in to theme.json
+			// In the future, we may do this differently.
+			$stylesheet .= 'a{color:var(--wp--style--color--link, #00e);}';
+		}
+
+		if ( $can_use_cached ) {
+			// Cache for a minute.
+			// This cache doesn't need to be any longer, we only want to avoid spikes on high-traffic sites.
+			set_transient( 'global_styles', $stylesheet, MINUTE_IN_SECONDS );
+		}
+
+		return $stylesheet;
+	}
+
+	/**
+	 * Returs the stylesheet for global styles.
+	 *
+	 * @param array  $theme_support_data Existing block editor settings.
+	 *                                   Empty array by default.
+	 * @param string $type Type of stylesheet we want accepts 'all', 'block_styles', and 'css_variables'.
+	 *
+	 * @return string
+	 */
+	public static function get_stylesheet( $theme_support_data = array(), $type = 'all' ) {
+		$origin = 'theme';
+		if (
+			WP_Theme_JSON_Resolver::theme_has_support() &&
+			gutenberg_is_fse_theme()
+		) {
+			// Only lookup for the user data if we need it.
+			$origin = 'user';
+		}
+		$tree = WP_Theme_JSON_Resolver::get_merged_data( $theme_support_data, $origin );
+		return WP_Theme_JSON_Resolver::tree_to_styles( $tree, $type );
+	}
+
+	/**
+	 * Returns the template part data of current theme.
+	 *
+	 * @return array
+	 */
+	public static function get_template_parts() {
+		return WP_Theme_JSON_Resolver::get_theme_data()->get( array( 'templateParts' ) );
+	}
+
+	/**
+	 * Returns the page templates of the current theme.
+	 *
+	 * @return array
+	 */
+	public static function get_custom_templates() {
+		return WP_Theme_JSON_Resolver::get_theme_data()->get( array( 'customTemplates' ) );
+	}
+
+	/**
+	 * Returns the settings & styles from the theme.
+	 *
+	 * @param array $theme_support_data Existing block editor settings.
+	 *                                  Empty array by default.
+	 *
+	 * @return array
+	 */
+	public static function get_theme_styles_and_settings( $theme_support_data = array() ) {
+		$raw_data = WP_Theme_JSON_Resolver::get_merged_data( $theme_support_data, 'theme' )->get();
+		return array(
+			'settings' => $raw_data['settings'],
+			'styles'   => $raw_data['styles'],
+		);
+	}
+
 	/**
 	 * Returns the CPT that contains the user's origin config
 	 * for the current theme or a void array if none found.
@@ -361,7 +477,7 @@ private static function get_user_data_from_custom_post_type( $should_create_cpt
 	 *
 	 * @return WP_Theme_JSON Entity that holds user data.
 	 */
-	public static function get_user_data() {
+	private static function get_user_data() {
 		if ( null !== self::$user ) {
 			return self::$user;
 		}
@@ -417,7 +533,7 @@ public static function get_user_data() {
 	 *
 	 * @return WP_Theme_JSON
 	 */
-	public static function get_merged_data( $theme_support_data = array(), $origin = 'user' ) {
+	private static function get_merged_data( $theme_support_data = array(), $origin = 'user' ) {
 		if ( 'theme' === $origin ) {
 			$result = new WP_Theme_JSON();
 			$result->merge( self::get_core_data() );
diff --git a/lib/class-wp-theme-json.php b/lib/class-wp-theme-json.php
index d967e1681acf18..4d1407055d2871 100644
--- a/lib/class-wp-theme-json.php
+++ b/lib/class-wp-theme-json.php
@@ -1018,56 +1018,19 @@ private function get_block_styles() {
 	}
 
 	/**
-	 * Returns the existing settings for each block.
+	 * Helper to get the tree or any of its subtrees.
 	 *
-	 * Example:
-	 *
-	 * {
-	 *   'root': {
-	 *     'color': {
-	 *       'custom': true
-	 *     }
-	 *   },
-	 *   'core/paragraph': {
-	 *     'spacing': {
-	 *       'customPadding': true
-	 *     }
-	 *   }
-	 * }
-	 *
-	 * @return array Settings per block.
-	 */
-	public function get_settings() {
-		if ( ! isset( $this->theme_json['settings'] ) ) {
-			return array();
-		} else {
-			return $this->theme_json['settings'];
-		}
-	}
-
-	/**
-	 * Returns the page templates of the current theme.
+	 * @param array $path Array of keys to get. If it's null, it'll return the whole theme.json.
+	 * @param any   $default The return value if the path does not exist within the array or if $path is not array. Default: empty array.
 	 *
 	 * @return array
 	 */
-	public function get_custom_templates() {
-		if ( ! isset( $this->theme_json['customTemplates'] ) ) {
-			return array();
-		} else {
-			return $this->theme_json['customTemplates'];
+	public function get( $path = null, $default = array() ) {
+		if ( null === $path ) {
+			return $this->theme_json;
 		}
-	}
 
-	/**
-	 * Returns the template part data of current theme.
-	 *
-	 * @return array
-	 */
-	public function get_template_parts() {
-		if ( ! isset( $this->theme_json['templateParts'] ) ) {
-			return array();
-		}
-		return $this->theme_json['templateParts'];
+		return _wp_array_get( $this->theme_json, $path, $default );
 	}
 
 	/**
@@ -1094,7 +1057,7 @@ public function get_stylesheet( $type = 'all' ) {
 	 * @param WP_Theme_JSON $incoming Data to merge.
 	 */
 	public function merge( $incoming ) {
-		$incoming_data    = $incoming->get_raw_data();
+		$incoming_data    = $incoming->get();
 		$this->theme_json = array_replace_recursive( $this->theme_json, $incoming_data );
 
 		// The array_replace_recursive algorithm merges at the leaf level.
@@ -1219,13 +1182,4 @@ public function remove_insecure_properties() {
 		}
 	}
 
-	/**
-	 * Returns the raw data.
-	 *
-	 * @return array Raw data.
-	 */
-	public function get_raw_data() {
-		return $this->theme_json;
-	}
-
 }
diff --git a/lib/full-site-editing/block-templates.php b/lib/full-site-editing/block-templates.php
index b1ee167d999619..bbc1131ffe8a27 100644
--- a/lib/full-site-editing/block-templates.php
+++ b/lib/full-site-editing/block-templates.php
@@ -125,7 +125,7 @@ function _gutenberg_get_template_files( $template_type ) {
  */
 function _gutenberg_add_template_part_area_info( $template_info ) {
 	if ( WP_Theme_JSON_Resolver::theme_has_support() ) {
-		$theme_data = WP_Theme_JSON_Resolver::get_theme_data()->get_template_parts();
+		$theme_data = WP_Theme_JSON_Resolver::get_template_parts();
 	}
 
 	if ( isset( $theme_data[ $template_info['slug'] ]['area'] ) ) {
diff --git a/lib/full-site-editing/page-templates.php b/lib/full-site-editing/page-templates.php
index 6c5a11c8a40e23..1153d8c983f49f 100644
--- a/lib/full-site-editing/page-templates.php
+++ b/lib/full-site-editing/page-templates.php
@@ -19,7 +19,7 @@ function gutenberg_load_block_page_templates( $templates, $theme, $post, $post_t
 		return $templates;
 	}
 
-	$data             = WP_Theme_JSON_Resolver::get_theme_data()->get_custom_templates();
+	$data             = WP_Theme_JSON_Resolver::get_custom_templates();
 	$custom_templates = array();
 	if ( isset( $data ) ) {
 		foreach ( $data  as $key => $template ) {
diff --git a/lib/global-styles.php b/lib/global-styles.php
index 9a935de29145eb..feb5680ae1c769 100644
--- a/lib/global-styles.php
+++ b/lib/global-styles.php
@@ -106,53 +106,6 @@ function gutenberg_experimental_global_styles_get_theme_support_settings( $setti
 	return $theme_settings;
 }
 
-/**
- * Takes a tree adhering to the theme.json schema and generates
- * the corresponding stylesheet.
- *
- * @param WP_Theme_JSON $tree Input tree.
- * @param string        $type Type of stylesheet we want accepts 'all', 'block_styles', and 'css_variables'.
- *
- * @return string Stylesheet.
- */
-function gutenberg_experimental_global_styles_get_stylesheet( $tree, $type = 'all' ) {
-	// Check if we can use cached.
-	$can_use_cached = (
-		( 'all' === $type ) &&
-		( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) &&
-		( ! defined( 'SCRIPT_DEBUG' ) || ! SCRIPT_DEBUG ) &&
-		( ! defined( 'REST_REQUEST' ) || ! REST_REQUEST ) &&
-		! is_admin()
-	);
-
-	if ( $can_use_cached ) {
-		// Check if we have the styles already cached.
-		$cached = get_transient( 'global_styles' );
-		if ( $cached ) {
-			return $cached;
-		}
-	}
-
-	$stylesheet = $tree->get_stylesheet( $type );
-
-	if ( ( 'all' === $type || 'block_styles' === $type ) && WP_Theme_JSON_Resolver::theme_has_support() ) {
-		// To support all themes, we added in the block-library stylesheet
-		// a style rule such as .has-link-color a { color: var(--wp--style--color--link, #00e); }
-		// so that existing link colors themes used didn't break.
-		// We add this here to make it work for themes that opt-in to theme.json
-		// In the future, we may do this differently.
-		$stylesheet .= 'a{color:var(--wp--style--color--link, #00e);}';
-	}
-
-	if ( $can_use_cached ) {
-		// Cache for a minute.
-		// This cache doesn't need to be any longer, we only want to avoid spikes on high-traffic sites.
-		set_transient( 'global_styles', $stylesheet, MINUTE_IN_SECONDS );
-	}
-
-	return $stylesheet;
-}
-
 /**
  * Fetches the preferences for each origin (core, theme, user)
  * and enqueues the resulting stylesheet.
@@ -164,10 +117,7 @@ function gutenberg_experimental_global_styles_enqueue_assets() {
 
 	$settings           = gutenberg_get_common_block_editor_settings();
 	$theme_support_data = gutenberg_experimental_global_styles_get_theme_support_settings( $settings );
-
-	$all = WP_Theme_JSON_Resolver::get_merged_data( $theme_support_data );
-
-	$stylesheet = gutenberg_experimental_global_styles_get_stylesheet( $all );
+	$stylesheet         = WP_Theme_JSON_Resolver::get_stylesheet( $theme_support_data );
 	if ( empty( $stylesheet ) ) {
 		return;
 	}
@@ -195,23 +145,13 @@ function gutenberg_experimental_global_styles_settings( $settings ) {
 	unset( $settings['fontSizes'] );
 	unset( $settings['gradients'] );
 
-	$origin = 'theme';
-	if (
-		WP_Theme_JSON_Resolver::theme_has_support() &&
-		gutenberg_is_fse_theme()
-	) {
-		// Only lookup for the user data if we need it.
-		$origin = 'user';
-	}
-	$tree = WP_Theme_JSON_Resolver::get_merged_data( $theme_support_data, $origin );
-
 	// STEP 1: ADD FEATURES
 	//
 	// These need to be always added to the editor settings,
 	// even for themes that don't support theme.json.
 	// An example of this is that the presets are configured
 	// from the theme support data.
-	$settings['__experimentalFeatures'] = $tree->get_settings();
+	$settings['__experimentalFeatures'] = WP_Theme_JSON_Resolver::get_settings( $theme_support_data );
 
 	// STEP 2 - IF EDIT-SITE, ADD DATA REQUIRED FOR GLOBAL STYLES SIDEBAR
 	//
@@ -227,7 +167,7 @@ function_exists( 'gutenberg_is_edit_site_page' ) &&
 		gutenberg_is_fse_theme()
 	) {
 		$user_cpt_id = WP_Theme_JSON_Resolver::get_user_custom_post_type_id();
-		$base_styles = WP_Theme_JSON_Resolver::get_merged_data( $theme_support_data, 'theme' )->get_raw_data();
+		$base_styles = WP_Theme_JSON_Resolver::get_theme_styles_and_settings( $theme_support_data );
 
 		$settings['__experimentalGlobalStylesUserEntityId'] = $user_cpt_id;
 		$settings['__experimentalGlobalStylesBaseStyles']   = $base_styles;
@@ -239,11 +179,11 @@ function_exists( 'gutenberg_is_edit_site_page' ) &&
 		// some of these should be added the wrapper class,
 		// as if they were added via add_editor_styles.
 		$settings['styles'][] = array(
-			'css'                     => gutenberg_experimental_global_styles_get_stylesheet( $tree, 'css_variables' ),
+			'css'                     => WP_Theme_JSON_Resolver::get_stylesheet( $theme_support_data, 'css_variables' ),
 			'__experimentalNoWrapper' => true,
 		);
 		$settings['styles'][] = array(
-			'css' => gutenberg_experimental_global_styles_get_stylesheet( $tree, 'block_styles' ),
+			'css' => WP_Theme_JSON_Resolver::get_stylesheet( $theme_support_data, 'block_styles' ),
 		);
 	}
 
@@ -286,7 +226,7 @@ function gutenberg_global_styles_filter_post( $content ) {
 		unset( $decoded_data['isGlobalStylesUserThemeJSON'] );
 		$theme_json = new WP_Theme_JSON( $decoded_data );
 		$theme_json->remove_insecure_properties();
-		$data_to_encode                                = $theme_json->get_raw_data();
+		$data_to_encode                                = $theme_json->get();
 		$data_to_encode['isGlobalStylesUserThemeJSON'] = true;
 		return wp_json_encode( $data_to_encode );
 	}
diff --git a/phpunit/class-wp-theme-json-test.php b/phpunit/class-wp-theme-json-test.php
index 81e77bcb234692..8fa4588926aac9 100644
--- a/phpunit/class-wp-theme-json-test.php
+++ b/phpunit/class-wp-theme-json-test.php
@@ -37,7 +37,7 @@ function test_schema_validation_subtree_is_removed_if_key_invalid() {
 				),
 			)
 		);
-		$result     = $theme_json->get_raw_data();
+		$result     = $theme_json->get();
 
 		$expected = array(
 			'styles' => array(
@@ -85,7 +85,7 @@ function test_schema_validation_subtree_is_removed_if_not_array() {
 			)
 		);
 
-		$actual   = $theme_json->get_raw_data();
+		$actual   = $theme_json->get();
 		$expected = array(
 			'styles' => array(
 				'core/group' => array(
@@ -130,7 +130,7 @@ function test_schema_validation_subtree_is_removed_if_empty() {
 				),
 			)
 		);
-		$result     = $theme_json->get_raw_data();
+		$result     = $theme_json->get();
 
 		$expected = array(
 			'styles' => array(
@@ -167,7 +167,7 @@ function test_schema_validation_subtree_is_removed_if_style_not_supported_by_blo
 			)
 		);
 
-		$actual   = $theme_json->get_raw_data();
+		$actual   = $theme_json->get();
 		$expected = array(
 			'styles' => array(
 				$root_name => array(
@@ -203,7 +203,7 @@ function test_get_settings() {
 			)
 		);
 
-		$result = $theme_json->get_settings();
+		$result = $theme_json->get( array( 'settings' ) );
 
 		$expected = array(
 			$root_name => array(
@@ -585,7 +585,7 @@ public function test_merge_incoming_data() {
 		$theme_json->merge( new WP_Theme_JSON( $add_key_in_styles ) );
 		$theme_json->merge( new WP_Theme_JSON( $add_invalid_context ) );
 		$theme_json->merge( new WP_Theme_JSON( $update_presets ) );
-		$result = $theme_json->get_raw_data();
+		$result = $theme_json->get();
 
 		$this->assertEqualSetsWithIndex( $expected, $result );
 	}
@@ -608,7 +608,7 @@ function test_remove_insecure_properties_removes_unsafe_styles() {
 			true
 		);
 		$theme_json->remove_insecure_properties();
-		$result   = $theme_json->get_raw_data();
+		$result   = $theme_json->get();
 		$expected = array(
 			'styles' => array(
 				'core/group' => array(
@@ -640,7 +640,7 @@ function test_remove_insecure_properties_removes_unsafe_styles_sub_properties()
 			true
 		);
 		$theme_json->remove_insecure_properties();
-		$result   = $theme_json->get_raw_data();
+		$result   = $theme_json->get();
 		$expected = array(
 			'styles' => array(
 				'core/group' => array(
@@ -692,7 +692,7 @@ function test_remove_insecure_properties_removes_non_preset_settings() {
 			true
 		);
 		$theme_json->remove_insecure_properties();
-		$result   = $theme_json->get_raw_data();
+		$result   = $theme_json->get();
 		$expected = array(
 			'settings' => array(
 				$root_name => array(
@@ -781,7 +781,7 @@ function test_remove_insecure_properties_removes_unsafe_preset_settings() {
 			true
 		);
 		$theme_json->remove_insecure_properties();
-		$result   = $theme_json->get_raw_data();
+		$result   = $theme_json->get();
 		$expected = array(
 			'settings' => array(
 				$root_name => array(
@@ -820,7 +820,7 @@ function test_get_custom_templates() {
 			)
 		);
 
-		$page_templates = $theme_json->get_custom_templates();
+		$page_templates = $theme_json->get( array( 'customTemplates' ) );
 
 		$this->assertEqualSetsWithIndex(
 			$page_templates,
@@ -843,7 +843,7 @@ function test_get_template_parts() {
 			)
 		);
 
-		$template_parts = $theme_json->get_template_parts();
+		$template_parts = $theme_json->get( array( 'templateParts' ) );
 
 		$this->assertEqualSetsWithIndex(
 			$template_parts,