Earlier quoted context omitted.
Distribution via alternative stores does not mean there’s no review and moderation. Junk stores may have their fans, but competitive alternatives to App Store will inevitably introduce some controls to maintain reputation and remain compliant. Their advantage will be price, not presence of junk apps. That’s how free market with consumer protection laws works: regulation defines parameters of new equilibrium and event…
Price wouldn't be the only point of differentiation though. Say Google were to bring the Play Store to iOS. Apple's App Store allows users to opt out of tracking. The Play Store does not. Wouldn't all apps that use an advertising based business model automatically gravitate towards the Play Store? If the goal is to make Apple open up their platform in a way that doesn't take away choices from users, we need a set of…
In EU the only legal way to do tracking is opt in, so this is a matter of law enforcement and not a long term competitive advantage.
The weakness of regulation is a problem of American users, which they can solve by voting for politicians who support better consumer protection. Of course they may choose otherwise and choose instead a quasi-monopoly of more expensive walled gardens. After all, America is democracy, isn’t it? :)