You shouldn't feel guilty for playing games, but if your sense of identity consists entirely of the fact that you play games, you should maybe address that. If you're identifying yourself as "A Gamer", then you're seriously telling me that you have no characteristics which are more defining to your sense of self, to your personality, to you as a human being, than the fact that you play video games? That's messed up, and people who do it are messed up.

It is, I believe, a growing recognition of that messed-up-edness that's leading to the rise of articles about the "death of the gamer", because normal human beings (like yourself) who may have previously said "oh, I like to play video games; I guess that makes me a gamer" are now saying "oh no actually these people are all horrible and I like to play games but I am not like them; please do not get confused!".