My impression is that the Google Play store is much less hostile to developers than the Apple store. Which makes for larger momentum/impact to actually move to 3rd party services.

(I have only dabbled in Android apps, my impression of the Apple situation is very much that, an impression.)

On the other hand Play Store is much more hostile to it’s users compared to Apple.

1) Because apple doesn't want developers to have any alternatives

2) Because apple doesn't want to compete

Looks to be about Apple's fear of losing control and allowing free choice.

I never understand people who make this argument. Everyone has choice, go buy an Android phone and install/customize whatever you want. Apple has chosen what parts of their OS and user experience they control versus what part they let the user control. Personally I'm very happy with it because it gives me higher quality apps and some reasonable protection versus the alternative. If your issue is that you don't like where that line is split, fine, then choose a different platform like Android. Now if Android didn't exist, then your argument would hold more water for me.