Two of my female cousins, early-mid 30s, took the "career over family/marriage" bait hook line and sinker. They're extremely successful mashallah, but they're not fulfilled, you sense the panic really start to set in. Fiat currency printed on toilet paper that's losing it's purchasing power every year is no substitute for a family and the things that really matter in life
I really have no real prejudice against life-time single people who don't or don't want to have kids but I noticed growing up that all my single and childless uncles and aunts seemed pretty lonely, sad and a little loopy too.
What people need to realize is that all this modern bullshit is the last 5 seconds of our history as a species. We spent 99.99% of our time as a species as Hunter-Gatherers who were basically never alone, pretty much always had monogamous relationships and children and were even raised more affectionately and close knit than nowadays with most late holocene HG cultures displaying that they borderline never put their babies down for the first 2 years or so. Someone, whether it's ayeeyo or awoowo or aabo or hooyo or habo is holding the child at all times.
That's what we as a species developed in mentally. Take that animal, put it in a concrete box and convince it can be happy with shallow relationships, minimal or shallow social interaction and no family and you'll get some pretty loopy and/or remorseful types in a few decades 9 times out of 10 from what I've seen.