I think Richard Stallman advocates for the exact opposite of what you seem to imply. He favors open source for everything, and not using any closed source. How is that him "supervising everything?"

You're missing the point. Folks are advocating not having Apple policing the app store and allowing other app stores, instead, which will be magically better-policed somehow, which is of course total bullshit. Thus my comment. FSF wants to get rid of what works for consumers, and gives consumers very tangible security and convenience benefits, and then replace it with...nothing. Nothing at all. And then just fantasize away all the benefits like they were not there. That's bullshit.