Neither does Facebook. Using user data to target ads is different than selling data to third parties.
Yes, it’s worse. Facebook doesn’t sell your data, they sell your attention and futures on your behavior. Apple doesn’t.
Sure they do. Apple's ad network is the third largest after Google and Meta.
It is exactly that. They use data your put on Facebook to make allow audience targeting down to even an individual level.
Consider how much environmental damage they're doing by churning out so many physical products and convincing many people to buy them ASAP. That's arguably worse than privacy issues. Not that Facebook is any better - their business model relies on helping turbocharge excessive consumerism through targeted ads.