Not all parents may understand that having children may mean drastic changes to lifestyle, and may not have been prepared for the ~27 years of stress that having children bring on.
Oddly enough, having kids gives me a purpose in Society, that otherwise being a 36 year old man would not have. Too old to join the military, too young for end-of-life services, too set in my buying habits for marketing to care at all about me.
As the wise Stringer Bell once said, you're like a 40 degree day.
But being a dad, society is all about that: my lack of physique is called "dadbod" and women can profess to fetishize about it, my asanine advice to my kids are subject of a comedy twitter account, my no-more-give a dame attitude for fashion sense is celebrated, and I even have a national holiday to celebrate being a Dad--which gives me a legit excuse to do what I want to do (which for most dads involves cooking food on a grill for their families)