>> The #1 thing I would tell any young person who would listen is that if you want them, finish having children by like 27
Unless one is from a wealthy family, following this advice basically means to give up a career.
Being a mom without a career is being insecure, it could end up in abusive relationship.
Anyone can end up in an abusive relationship, not just women. Choose well, indeed. And choose a career which offers generous benefits.
Also, I know women who work in tech who did that advice and are fine. They make high enough salaries to afford good daycare (or it is provided onsite).