Lizard specifically stated that any responsible adult should budget time specifically for gaming, to the exclusion of other activities or reepsonsibilities, if necessary. While I understand the importance of sticking to a commitment, I'd like to think that for truly responsible adults, non-leisure commitments always take precendence over hobby pursuits. Frankly, if I tell my kid I'm going to pick them up from school, being there is a much higher priority for me than being at the weekly game session.
Uhm...no.
I said if you've decided to commit to a game, you should make sure you've allocated the time for it. The decision to commit should be based on your other priorities. If you know you need to pick your kid up from school every Tuesday, you don't tell your friends "Oh, I'd love to game on Tuesdays!" If you find out that you were free on Tuesdays, but now you're not, you say "Can we move the game to Thursday? Or else I'm going to have to drop out, sorry."
I was talking about gaming in the context of all other leisure commitments. It would be grossly irresponsible to quit a job in order to have more time to game. By the same token, if you know your job often means you have to work late and that you can't reliably be somewhere every Tuesday at 6, you don't tell people you will be.
Likewise, I don't think it's irresponsible to, say, have a sitter for the kids one night a week so Mommy and Daddy can have some adult time with their friends.