It goes both ways.
Guys that do have families are willing to give up a lot too. Things I was never really willing to give up.
I have dated a lot and there is one woman I would have wanted kids with. She wasn't into that with me though.
That is not a problem with the woman, that is a problem with me.
I know a few guys in this same situation. It is not a problem with the dating market, it is a type of narcissism that clouds judgement and sets standards that can't be met.
It is hard to see it in yourself until you get a vasectomy.