This is why devs are afraid of publicly criticizing Apple, let alone testifying against them in the court.
Apple has shown that they will then prevent you from accessing 50%+ of the US market.
In short Apple is a bully, has been for more than a decade now, and it has worked out well for them.
You start spending all your time programming in middle school. By the time you enter college you know everything needed to write simple emulators, and then you meet other students that motivate you to up your game and complexify your projects, like working on a Nintendo Switch emulator.
It doesn't require being a genius or a fast learner, it just requires the good fortune of having programming be your passion.
If you want to catch up to these guys when you only start to learn programming in college, it's doable but it requires you to be a fast learner and also be somewhat passionated in programming.
It's possible that the problem is that speech is not the right abstraction.
Perhaps we should be advocating for something along the lines of "free expression of reasoning".
No chance of Apple implementing this outside of the EU if they are not forced to.
They are getting billions from Google every year because Safari is the most used browser on iOS, and they will do what is necessary to make this last for as long as possible.
Modern browsers use an extremely wide range of system APIs:
process/IPC/sandboxing, memory, networking/connectivity (e.g. bluetooth), filesystem, GPU, audio, windowing system, device IO (keyboards, webcam), and more I'm sure.
I can't think of any other kind of software that come close. If you can run a modern browser it means that your OS is already quite mature.