On iOS, it tells the app you only gave it limited access, and that causes some apps to badger you for full access or refuse to work without full access.

On iOS, there's the picker for access. It doesnt trick the app into thinking it has full access. All apps should just be forced to use the private picker style which is convenient and private.

This feature is to make privacy-invasive apps, that want to snoop and degrade functionality if they don't, behave.