Facebook gave you a separate way to use Facebook Connect as a passport for creating new accounts on 3rd party apps and websites, without being forced to install Facebook’s entire app, news feed and notifications.
How Technology is Hijacking Your Mind — from a Former Insider
Tristan Harris
118K1,009

I’m somewhat relieved that they have spun out Events as a separate app, but it’s unfortunate that Messenger has turned into a renegade.