What exactly is the problem with writing so much? Is there anything as too much? As @Taraz said it quite well, everyone is free to do what they want. He is free to write, and others are free to watch TV. What we do in our free time concerns us and only us.
Yet here we are on a platform that promotes engagement through posting. This guy writes and does that pretty well. He happened to find a platform rewarding what he does best.
A habit is a great thing when it feeds your passions, which I think it is (correct me if I'm wrong Taraz). If you can take this passion and make it a way of living, why the heck wouldn't you do it?
RE: Projection: How can someone do such a thing?