Antitrust laws _can_ be good, but like I said elsewhere, we are a country swimming neck deep in regulation and seem to like our particular hammer. It has a cooling effect on innovation, and China in some ways has a freer economy than we do.
I think it odd that many people rush to strongarm companies through law when there is a perfectly good alternative in Android. Even Microsoft and Amazon have been in the phone business and could get back in, offering you a phone with multiple app stores. Epic could even do it. There doesn’t seem to be enough people who care. You apparently do, and actually I agree with you that Apple should allow alternative app stores. But voluntarily because the people demand it or are leaving for Android, not because the hammer came down on them.