My summary: The Atlantic, rather than arguing for government regulation, argues for Apple to be the regulator. The argument is that Apple only enforced the contractual agreement, and did not enforce as a part of their privacy stance (which, to my knowledge, is not part of a canonical, enforceable document).

"Crucially, Apple didn’t ban Facebook from the App Store or the iPhone platform: You can still download and use Messenger."

AFAICT, Apple has no legal leg to stand on were they to do so. There is nothing in their contract with FB (assuming it is at least similar to the one us little folk get) that says FB has committed an app-banning offense. IANAL, etc., but this strikes me as the magazine's attempt at "but Apple's just as bad!" click-bait.