Yes, yes, you're right about discipline and the "overly-simplistic" point. I was being sarcastic.

But I really wish my doctors don't count on comments on LinkedIn to keep up with "new drugs and treatments"! I hope they're subscribed to professional journals or go to conferences, etc.

The larger point being, every professional community has its specialized hubs. If LinkedIn strategy is to become the universal professional hub for all... well then that's a "frighteningly ambitious" idea.

I can't see them pulling it off but who knows -- and thanks for pointing it out.