You didn't address anything I wrote. The issue is not the 30%, it's the lack of choice. Apple locks businesses into having to support Apple Pay to access the user base of Apple users. Google doesn't do this: apps can be distributed via F-Droid or just downloaded from the net. Steam doesn't do this: you can just run apps you bought years ago, or bought from GOG, even on devices built by Valve.

I'll say the same thing, another way: Apple is the only smartphone manufacturer that forces you to install apps through their services only.