I also had kids, and while I love my kids I haven’t loved spending time with my kids. This will hopefully change as they age, but the first six years have so far been very much a drag on my life and productivity, and not much else. They haven’t provided fulfilment, and they haven’t provided satisfaction. Some joy is there from time to time, definitely, but nothing in the way the author describes. Happiness for me typically starts after my kids are in bed or when I can escape them during work hours. My wife finds great happiness in our children, and I find happiness in that, but I’m desperately waiting for my kids to be old enough that I only need to spend time with them instead of constantly caring for them. Sorry if this is a bit of a dark comment, but I just wanted to say it’s not always the experience this author had, even if it seems common.