It's a show marketed at kids. Manu adults like it as they grew up with it. Manu adultsike the games, but those unfamiliar are not starting as adults.
For me, it's not about having a childhood hobby you still enjoy. It's about not having the social awareness to not being it up on a first date. In context, sure, why not, if you walked by a poster or kid playing and it became a topic of conversation. But as a topic of conversation whose purpose is to get to know each other, I'd be worried they never matured.
I still.play video games from my childhood almost daily, when I get the chance. I won't chat about combos or new sf6 characters with strangers or a first date.