For photos, I wish iOS would not require a permission at all in the case where I just want it to open an OS-controlled file picker and then give the app the one photo, akin to copy-pasting it. No reason to give access to every photo when only N are picked.
It’s been a while since I worked with the photo library APIs in iOS, but as I recall there in fact is an API that apps can use to request the user to pick individual photos from an OS picker without further permissions. Most apps just don’t use it because they all want to do their own custom photo picker UIs (even privacy focused apps fall victim to this).