One could easily argue that Apple is sunsetting the Android app for one of the same reasons we can't install MacOS on a non-Apple PC (without violating the EULA): Apple doesn't like supporting unpredictable platforms, and doesn't want to be in a situation where people blame them for other people's bugs and unexpected under-the-hood changes.
Do you really believe that Apple doesn't allow macOS on PCs because of "unpredictability"? I think it's pretty obvious by now that bundling is a great way to differentiate their hardware, charge a premium, and lock users in their ecosystem. Remember the people who complained about issues with the butterfly keyboard, but kept buying Macbooks just because of macOS?
