This sounds similar to the current brouhaha happening in the US over America’s inclination towards personal freedom at all cost even when govt regulation could/should step in the make things better.
A concern that once “freedom of choice of App Store” is provided, where does it stop because ultimately those demanding choice will keep demanding aspects be “open up” “for fairness” until iOS isn’t special anymore. Part of what makes it special _is_ it’s regulation, if you don’t want that then “choose” elsewhere. This aspect feels like the problem in the US of big business battling for deregulation which... isn’t always so great.
I’m not saying “Apple is doing it for the people!”, necessarily but Apple is doing it to be Apple, let’s not make everything the same.