Yes, I know that’s not explicitly what Fortnite was kicked off for. But let’s be honest here and look at Apple’s long history of anticompetitive behavior - that’s the core concern here, and Apple has shown a clear willingness to disadvantage 3rd party competitors.
Sure, Spotify is on the App Store - but when will I be able to download music and play it directly from my Watch with Spotify? Likely never - Apple simply will not allow that, while hypocritically allowing it with Apple Music.
So let’s not pretend - Apple cares about Apple first and second, and everyone else third.