Isn't most of what humans do wasteful? What about "lieing on a beach sipping cocktails to death" or "commuting to death" or "painting to death" or "watching TV to death" or "reading to death"?
If you condemn computer games, you condemn all other forms of art at the same time. So I suppose the only worthwhile conducts of human life are technological and scientific research, and building infrastructure? I don't think it is as simple as that. And if you have created the perfect infrastructure and won against cancer, then what? Why live? What did you optimize for? That we can enjoy stuff seems to make us want to live at the same time.