I know it's a strange question, but I'm many years old and I keep playing online games. My wife says it's nonsense and I should stop it. Is she right?

I cannot answer this question objectively. I've been playing online games for a long time and I like doing it. I met a girl in an online game and now we are happy. But the game can become a very dangerous addiction and so you need to have a plan for how to act. For example I always keep track of player ratings in my favorite game track your Warzone stats