I didn't elaborate on this. But this is what I meant when I pointed out my possible privilege. I don't want to condemn people who use it; and it might indeed be a very good communication tool for many people. I know how WhatsApp has changed my elder relatives' way of communicating and I can't imagine that anything else but Facebook's power to create size effects did this...

But I'm very sure that it doesn't need Facebook to do this right. It could be anything else.