I don't think the two concepts are mutually exclusive. I've noticed with myself that no matter what I'm doing, and what apps I'm using on my desktop, Facebook

I don't think the two concepts are mutually exclusive. I've noticed with myself that no matter what I'm doing, and what apps I'm using on my desktop, Facebook is always open in a tab. Which is to say, my high-intent and highly-guided behavior on the computer sits on top of a constant baseline social presence. Personally I'd be happy if Facebook Messenger was built into the phone such that I can respond to messages without breaking my flow in my current app. But I'm on iOS, so I'm really not holding my breath. Putting social networking into the background IMO aligns it closer to how I actually use it. Facebook as a high-intent application doesn't seem to work quite right.