Which is why there's no shame in using tools to help you build discipline.
But at the same time, social networks and other distractions are deliberately designed to be as addictive as possible, by some of the smartest people in the world. You could say this is a matter of discipline, and it is. Yes, the internet is a place where work happens, but distractions are always a click away. So why do I think I can get work done online? I find it hard to get work done while watching movies, visiting theme parks, or hanging out with my friends.