"I would never date a girl without ovaries." "...but she can't conceive kids so you break off the relationship."
YEAH. That's usually the point. The vast majority of dating is to become a mating pair. If you don't want kids, that's valid but a minority viewpoint still, despite growing in recent years. I want to pass on my genes, and not raise someone else's mistake. You don't get to shame me into a deviant relationship for that.
Some natal women can't conceive. Is it unfair? Yeah. They have to cope, and can usually find relationships with men anyways who aren't looking for kids. Sterile women still have way better relationship and adoption options than any trans though.