That Dave Grohl one is great because it's real. I read an article (in an actual magazine) called "Poo Fighters" and it was about how they're all married now and have young kids and how their lives have changed. He's absolutely right. Your kids don't care that you're a famous rock star or whatever. You're just Daddy, and you have certain obligations.
It does sound like he spoils them a bit, though. If one of my kids ever told me that they need a smoothie now, I can tell you for damned sure that my response would not be "Okaaay."