Off the cuff I do think it's pretty good advice if someone is unfulfilled or really spending a bunch of time just relaxing. Almost everyone I know with nothing much going on that had kids are happier for it. If you are wasting your life fucking about, kids will force you to do something with your life, and raising kids is an honorable use of time.

If you already have a fulfilling and happy life without children though you are throwing a wrench into a good thing with a dice roll of how it's going to turn out. Turns out, I'm not the kind of person that finds raising children fulfilling. If my life was already unfulfilling, then that wouldn't have made much difference and at least added a distraction.

There's no one to blame but me for that, but I'm here to pass on the experience.

Of course what's interesting is that while you do have the obligation to provide for and take care of your kids, you don't have the obligation to enjoy it or find it fulfilling. But people get offended if you don't, which I've never understood, as there is nothing dishonorable about it.