I can’t agree more.
A friend of mine spends literally his not- at-work time playing games to the point that he sometimes comes to work with no or so little sleep. Moreover, he speaks about the games he loves for prolonged times and in such a serious way with which others speak about work or family critical issues. I even noticed that the way in which he thinks is completely affected by games. I wanted to outline to him the fact that he exhausts his menal faculties in something that is not going to make a difference in his life but he is too taken by gaming to process what I am saying.
Usually I don’t intervene in others preferences but in this case I felt it is my duty to bring his attention to what he is losing.