Apple doesn't really have experience with building a platform for user generated content. Sure, they have the technological might, but content moderation, recommendation fairness, ad monetization, etc. are different beasts and usually come with awful publicity risks that might just not be worth the effort for the world's richest company.
They are like 99% there tho. You can start group chat in iMessage and share iCloud videos there. There's some moderation built in iCloud imagine scanning.
That was to let governments know they are willing to write software to find files the government doesn't want people to have. Child porn is just the icing smeared on that turd.
Good point. Although I'd also say that the barrier to entry for content producers is somewhat higher for App Store. You'd likely need some level of computer science education and their review process also takes longer and is controversial at times.
