1997 Denise Richards and Dina Meyer absolutely mog any actress working right now. I'd say both of them are at least 9s.
Clearly there are scores of other reasons any remake is doomed, but that's the most obvious one. In the age of DEI, superhumanly attractive women are extinct.
Heinlein was about self reliance. He wasn't mocking it to highlight the benefits he was describing how empty they leave the individual even when they are ultimately necessary.