My mum wishes she'd never had kids. She loves us, but she came from a generation where there wasn't really a choice, socially, as there is now. She hated the drudgery and found children irritating and exasperating, and to be perfectly honest, we knew it. Kids always do. It wasn't anyone's fault, but I think people should only have kids if they absolutely want them. They drain so much time, money, and energy from you and they are very hard on a marriage, too.
I love being a mum. I'm so pleased I did it. But I'd never, ever, judge someone who felt life offered other things. That's honest, and actually a lot fairer on the potential child, too.
Lots of people I knew did change their minds, and they do love being parents. You may. But you may not. Either is a valid and worthwhile choice, and you have my admiration for swimming against the tide.
It's also fairly sexist, that we see women this way. Childless men are far less likely to be seen as unfulfilled, and few expect them to die as cat gentlemen. We still regard women as reproductive in a way we don't men. Biology need not be destiny.