Earlier quoted context omitted.
Only Apple sells iPhones, so I wouldn’t worry about preinstalled 3rd party apps with root permissions like we see on Android phones.
Only Facebook makes the Facebook app, and I find it extremely easy to imagine a Facebook app that can only be sideloaded, so that Facebook can bypass the restrictions put in place by the App Store. For instance, Apps are currently not allowed to degrade functionality if the user says no to a permissions request (e.g. location tracking).
Instead, what Apple is doing is finding a new balance that appease those who are attacking the legitimacy of the App Store (and its toll booth) while in practice the vast majority of iPhone users will retain their privacy.