If adults shouldn't be playing games then they shouldn't be watching movies or listening to music. Games shouldn't be your life unless you plan on making your career somewhere in the game's industry, but if someone wants to play a couple hours after their kids go to sleep or with their kids, why not? The important thing is not to overdo it and to keep your immediate responsibilities in mind.

I play a lot, moreso than most people, but I don't think I will be playing as much if I have a family.