It's not just muh diversity thats killing games. But the fact they are all just soulless remakes and sequels and all the original IPs are creatively bankrupt watered down garbage. Hardly any good games are released anymore and it seems like every year it's just waiting for the "One big game" instead of back in the day when 5-6 big games came out every fucking year.
The growth of the industry has made it become so inflated that it can no longer afford to be creative, and the games claiming to be "creative" are just phony and they most of the time have utterly shit gameplay that we've seen a million times before.
Anybody who says "you are just getting too old" is just being an ignorant ass and doesn't want their baseless optimism ruined, or is just a pre-teen who never got to experience the better days of the industry.