That's... literally what Apple is doing. Facebook is crying because they know that a lot of people will opt out of the tracking when given the choice.

Oops. Yes. But Apple is not applying it consistently. They are still policing us in a lot of different ways too. One of the many examples is that Firefox is forced to use webkit on iOS, and nobody is allowed to have their own web rendering engine in the app store, which goes right against the principles of general purpose computing and having control over your own device. It's nice that Apple has a content-filter for people who are not tech-savvy, or for kids who are not allowed to see certain content, but that filter should be optional.

Ok, so you want Apple to allow iOS to be completely open. That's obviously not gonna happen.

Yes, because it's a slippery slope and I don't want to end up in a programmer's dystopian future.