alt Hacker NewsCaveat emptor. I am a grandparent now, so I think I have some perspective on this.
Of course we love our kids, and we had (and still have) a lot of good times with them. But kids can really break your life and marriage, too - amongst my peers I can't tell you how many have a struggling young adult kid or two (with relatively serious mental or physical health problems), with no resolution in sight.
So stay lucky - having a child is a wild act of optimism. And if you want kids, don't wait too long. There is never really a good time to have a kid (just different trade-offs), so for the best chances for health, be as young a parent as possible. And men have a biological clock, too: e.g.: https://neurosciencenews.com/genetics-sperm-mutation-neurode...
The serious mental and physical health problems are real and a societal concern. Everyone "notices" the trends, but maybe it's not you so you just think there's nothing you can do about it and do your best to stay healthy.
Then you have a child and you are suddenly hyper-aware of everything going into the body and brain. Everything they eat, every doctor visit, every time they get sick and what could have exposed them, every word spoken on TV, every friend they have and how they act or how that friend passes along their parents influences, etc.
And suddenly you're very concerned about societal level macro influences on food, medical, etc because those influences are going to affect your child's life.