diff --git a/lib/actions/entry-actions.js b/lib/actions/entry-actions.js
--- a/lib/actions/entry-actions.js
+++ b/lib/actions/entry-actions.js
@@ -37,7 +37,10 @@
 } from '../types/entry-types.js';
 import type { HistoryRevisionInfo } from '../types/history-types.js';
 import type { ThreadInfo } from '../types/minimally-encoded-thread-permissions-types';
-import { thickThreadTypes } from '../types/thread-types-enum.js';
+import {
+  thickThreadTypes,
+  threadTypeIsThick,
+} from '../types/thread-types-enum.js';
 import {
   dateFromString,
   dateString as stringFromDate,
@@ -198,17 +201,10 @@
     };
   };
 
-export type UseCreateEntryInput = $ReadOnly<
-  | {
-      +thick: false,
-      +createEntryInfo: CreateEntryInfo,
-    }
-  | {
-      +thick: true,
-      +threadInfo: ThreadInfo,
-      +createEntryInfo: CreateEntryInfo,
-    },
->;
+export type UseCreateEntryInput = {
+  +threadInfo: ThreadInfo,
+  +createEntryInfo: CreateEntryInfo,
+};
 function useCreateEntry(): (
   input: UseCreateEntryInput,
 ) => Promise<CreateEntryPayload> {
@@ -221,7 +217,7 @@
 
   return React.useCallback(
     async (input: UseCreateEntryInput) => {
-      if (!input.thick) {
+      if (!threadTypeIsThick(input.threadInfo.type)) {
         const result = await keyserverCall(input.createEntryInfo);
         return result;
       }
@@ -301,17 +297,10 @@
     };
   };
 
-export type UseSaveEntryInput = $ReadOnly<
-  | {
-      +thick: false,
-      +saveEntryInfo: SaveEntryInfo,
-    }
-  | {
-      +thick: true,
-      +threadInfo: ThreadInfo,
-      +saveEntryInfo: SaveEntryInfo,
-    },
->;
+export type UseSaveEntryInput = {
+  +threadInfo: ThreadInfo,
+  +saveEntryInfo: SaveEntryInfo,
+};
 function useSaveEntry(): (
   input: UseSaveEntryInput,
 ) => Promise<SaveEntryResult> {
@@ -325,7 +314,7 @@
 
   return React.useCallback(
     async (input: UseSaveEntryInput) => {
-      if (!input.thick) {
+      if (!threadTypeIsThick(input.threadInfo.type)) {
         const result = await keyserverCall(input.saveEntryInfo);
         return result;
       }
@@ -408,17 +397,10 @@
     };
   };
 
-export type UseDeleteEntryInput = $ReadOnly<
-  | {
-      +thick: false,
-      +deleteEntryInfo: DeleteEntryInfo,
-    }
-  | {
-      +thick: true,
-      +threadInfo: ThreadInfo,
-      +deleteEntryInfo: DeleteEntryInfo,
-    },
->;
+export type UseDeleteEntryInput = {
+  +threadInfo: ThreadInfo,
+  +deleteEntryInfo: DeleteEntryInfo,
+};
 function useDeleteEntry(): (
   input: UseDeleteEntryInput,
 ) => Promise<DeleteEntryResult> {
@@ -432,7 +414,7 @@
 
   return React.useCallback(
     async (input: UseDeleteEntryInput) => {
-      if (!input.thick) {
+      if (!threadTypeIsThick(input.threadInfo.type)) {
         const result = await keyserverCall(input.deleteEntryInfo);
         return result;
       }
diff --git a/native/calendar/entry.react.js b/native/calendar/entry.react.js
--- a/native/calendar/entry.react.js
+++ b/native/calendar/entry.react.js
@@ -652,16 +652,10 @@
         calendarQuery: this.props.calendarQuery(),
       };
 
-      const useCreateEntryInput = threadTypeIsThick(this.props.threadInfo.type)
-        ? {
-            thick: true,
-            threadInfo: this.props.threadInfo,
-            createEntryInfo,
-          }
-        : {
-            thick: false,
-            createEntryInfo,
-          };
+      const useCreateEntryInput = {
+        threadInfo: this.props.threadInfo,
+        createEntryInfo,
+      };
 
       const response = await this.props.createEntry(useCreateEntryInput);
 
@@ -706,16 +700,10 @@
         calendarQuery: this.props.calendarQuery(),
       };
 
-      const useSaveEntryInput = threadTypeIsThick(this.props.threadInfo.type)
-        ? {
-            thick: true,
-            threadInfo: this.props.threadInfo,
-            saveEntryInfo,
-          }
-        : {
-            thick: false,
-            saveEntryInfo,
-          };
+      const useSaveEntryInput = {
+        threadInfo: this.props.threadInfo,
+        saveEntryInfo,
+      };
 
       const response = await this.props.saveEntry(useSaveEntryInput);
       if (curSaveAttempt + 1 === this.nextSaveAttemptIndex) {
@@ -797,16 +785,10 @@
         calendarQuery: this.props.calendarQuery(),
       };
 
-      const useDeleteEntryInput = threadTypeIsThick(this.props.threadInfo.type)
-        ? {
-            thick: true,
-            threadInfo: this.props.threadInfo,
-            deleteEntryInfo,
-          }
-        : {
-            thick: false,
-            deleteEntryInfo,
-          };
+      const useDeleteEntryInput = {
+        threadInfo: this.props.threadInfo,
+        deleteEntryInfo,
+      };
 
       return await this.props.deleteEntry(useDeleteEntryInput);
     } else if (this.creating || this.currentlySaving) {
diff --git a/web/calendar/entry.react.js b/web/calendar/entry.react.js
--- a/web/calendar/entry.react.js
+++ b/web/calendar/entry.react.js
@@ -341,16 +341,10 @@
         calendarQuery: this.props.calendarQuery(),
       };
 
-      const useCreateEntryInput = threadTypeIsThick(this.props.threadInfo.type)
-        ? {
-            thick: true,
-            threadInfo: this.props.threadInfo,
-            createEntryInfo,
-          }
-        : {
-            thick: false,
-            createEntryInfo,
-          };
+      const useCreateEntryInput = {
+        threadInfo: this.props.threadInfo,
+        createEntryInfo,
+      };
 
       const response = await this.props.createEntry(useCreateEntryInput);
       if (curSaveAttempt + 1 === this.nextSaveAttemptIndex) {
@@ -391,16 +385,10 @@
         calendarQuery: this.props.calendarQuery(),
       };
 
-      const useSaveEntryInput = threadTypeIsThick(this.props.threadInfo.type)
-        ? {
-            thick: true,
-            threadInfo: this.props.threadInfo,
-            saveEntryInfo,
-          }
-        : {
-            thick: false,
-            saveEntryInfo,
-          };
+      const useSaveEntryInput = {
+        threadInfo: this.props.threadInfo,
+        saveEntryInfo,
+      };
 
       const response = await this.props.saveEntry(useSaveEntryInput);
       if (curSaveAttempt + 1 === this.nextSaveAttemptIndex) {
@@ -466,16 +454,10 @@
         calendarQuery: this.props.calendarQuery(),
       };
 
-      const useDeleteEntryInput = threadTypeIsThick(this.props.threadInfo.type)
-        ? {
-            thick: true,
-            threadInfo: this.props.threadInfo,
-            deleteEntryInfo,
-          }
-        : {
-            thick: false,
-            deleteEntryInfo,
-          };
+      const useDeleteEntryInput = {
+        threadInfo: this.props.threadInfo,
+        deleteEntryInfo,
+      };
 
       return await this.props.deleteEntry(useDeleteEntryInput);
     } else if (this.creating) {