> if you're going to have kids, have them young. There is absolutely nothing on this earth which is as valuable as the time you'll have with your children

This is entirely self-centered. The kids, instead, benefit immensely from having parents with experience, emotional maturity, financial stability, better work-life balance.

You might not get to meet your grand[grand]kids but this is a sacrifice parents should be willing to make to provide a good life to their kids.