Well, people are just as addictive, so you keep on playing a game you've lost interest in for a long time, just to be with them, then one day to realize, that you're alone, because they've moved on and you're just sort of doing the things you were doing while socializing with them, out of habit.
Looking back at my half-finished projects and at the time I farmed the Insane for about 2 months, 12 hours a day, every day, tssshyeah, I could have been more productive. I'm an artistic person and art is a productive hobby for me, which I have mostly neglected in the last couple of years. Maybe if I started doing that a bit earlier, I would have at least a glint of promise for my future in front of me by now. Get it? Maybe it's a part of growing up - deciding to focus on the more important stuff in light of my future. This is not a generalization, it's about me. It's not about the people who have these things alredy, not about the dads who can afford some free time in the afternoon. Not even about the grandparents who just play for fun (we had a grandma in our guild, she was pretty kick-ass!). Maybe this is unrelated to you personally, or your experiences, there's nothing wrong with that, but I'm going out on a limb here and say that it's not something me - or you can generalize.