Any of this is already possible on MacOS, Windows, and Android. It's not actually so wild as you're making it out to be. Just ignore the software merchants you don't want to affiliate with. I don't like Valve, so I don't install their 'appstore' Steam. That means I can't buy games that are only sold on Steam. Big whoop, it's a consequence I accept of a decision I am free to make or reconsider. Life goes on.