It sounds like you've completely misunderstood the aphorism "raising kids and a having a career". It's not the state of being a biological parent that's sought after (which yes parents have automatically) but of _raising_ children.

You can't raise children in absentia. If you're concentrating on your career you simply can't dedicate yourself to raising children.

So, no fathers haven't always had it all because having it all is a practical impossibility in almost all walks of life.