I think it’s more because those people don’t have a life outside their computer, and some of them have poor social skills and inflated ego from knowing a bit about computers.
If you spend all your time on the internet, and specially social media, you get a warped view of reality.
But it’s hard to get proper friends for a lot of people. I understand why the internet becomes a substitute.
I just wish they would be nicer. If it is like you say, and they are social, I wonder why they act like shit heads online. :)