Start with default generated template

aaron.theme

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * @file
+ * Functions to support theming.
+ */
+
+/**
+ * Implements hook_preprocess_image_widget().
+ */
+function aaron_preprocess_image_widget(array &$variables): void {
+  $data = &$variables['data'];
+
+  // This prevents image widget templates from rendering preview container HTML
+  // to users that do not have permission to access these previews.
+  // @todo revisit in https://drupal.org/node/953034
+  // @todo revisit in https://drupal.org/node/3114318
+  if (isset($data['preview']['#access']) && $data['preview']['#access'] === FALSE) {
+    unset($data['preview']);
+  }
+}