I’d argue you misunderstood it. I’m hypothesizing that your lizard brain forces this “kids are important” attitude on you and is artificial and ephemeral. Not what truly makes you happy long term.
First, I was just explaining what I thought the author meant. I guess you are making a parallel point.
Second, I haven't met many people who are "happy long term" who don't have children front and center in their lives. Have you? What is the thing that is giving your life meaning that during your days and on your death bed you will feel great about?