The rules of the platform should be the same for all users of the platform. You can't play the game and be the referee.

I don't see how this prevents an integrated user experience. It's orthogonal.

If the user experience for permission management is well designed, and the APIs are thoughtful, this shouldn't be a problem.

It's a problem in iOS today because the user experience and APIs are an afterthought, and there's a disincentive for making them good.