> believe that their children will have good lives

Again, no. That's a patronizing abstraction implying you need to convince them of the general value of the activity, and assumes she's doing it all "for the kids" and not for herself. You aren't chasing your dreams for abstract ideas of future children, why should she?

I'm saying that a mother needs to know she'll be just as wealthy, in a practical (if not 100% literal) sense, by having a child than by chasing a career. If you aren't willing to hand that cash over, then, to be blunt, GTFO. She's not going to bear kids for your utopia.