Facebook says Apple is too powerful – they're right
Apple is way too powerful. Not that Facebook is any better, but Facebook is not the gatekeeper for millions of peoples lives. When Apple boots you as a customer, you most likely will lose everything about your digital life.If you lose your Facebook account, it's annoying but recoverable.Apple has control over your phone, your passwords, your photos, your music, your emails, your credit cards/payment methods. And you can backup nothing of it in a usable way. 
Without a working Apple account any iPhone is as good as a brick.