You don’t think that those third parties would move their apps to be exclusive to their stores?

The way it is now is very straightforward. If you want an app, you know where to get it. You know who’s vetted it. You know who’s handling your payment info. You (now) know what information about you is being gathered and disseminated.

Can you imagine how terrible a world where every App thinks it needs its own store would be?

This hasn’t really happened on Android or desktop open platforms. There are alternative app stores, but certainly not one for each app, and it would be a self-inflicted distribution wound for an app to go exclusive to a smaller app store.

Having a uniform way to handle payments is a great feature, but it would happen naturally if payment terms were competitive with industry norms instead of extractive prices that require a lock on distribution.