What does age have to do with it?
Now that I'm fortunate enough to be liberated from these considerations I choose to do more expensive outgoing things like backpacking, going to festivals, trying new restaurants, biking, etc. I make occasional exceptions but these days I try and stay away from video games; it'll be easier to catch up on all the games that I missed when I'm retired in 30 years and don't feel like walking 20 miles in a weekend.
It's not a mystery to anybody else why they immediately switch interests after finally reaching stability to 'do the thing they've always wanted to have time to do' and glorified multiple years of their adolescence engaging in: they aren't interested in it as much anymore, or were never actually that interested in it. It's weird that they'll always be the last to figure it out.
Single player games are lonely. Multiplayer games are mostly competitive. Cooperative multiplayer is just socializing with busy-work added. And they usually demand an entire screen to themselves, when I would rather have a few windows open at once.