I had my first children when I made less than 1/3 of what I make now and new college grads are making 4/5 of what I make now. And I'm still raising children. You can argue about inflation or whatever you want. I don't buy it.
Just admit that you are not willing to give up anything to accommodate children.
I'm not saying that you should give up anything. Those are your choices. But you do have a choice.
I have neighbors who make $40K and raise children--yes, more than one. Right now. Today. In the U.S. No welfare.
It is within the reach of most everyone on HN to become a middle school math teacher in Kansas and raise a family. Very few make that choice. But they do have the choice.