I know the selfie app was just an example, but what's the point of a selfie app if you can't share the selfies? Also you are assuming people have due diligence

I know the selfie app was just an example, but what's the point of a selfie app if you can't share the selfies? Also you are assuming people have due diligence to actually care or understand which permissions an app is requesting and to actually stop long enough to consider the implications. Consider that most of the world is technologically illiterate, and pop-ups will probably at most be a very mild annoyance for end-users who blindly press ALLOW in order to open the app because it has kittens and rainbows.