It's fairly on the nose, if you zoom out a bit and look at the plot at arms length.

You might remember that after the female lead character hibernates into the future. She's wondering where all the men are, until someone explains that men have become "feminized" to the point that they are as "frail" and "beautiful" as women. The reason given is the prolonged period of prosperity making "real" men unneeded and unattractive, which is fucking stupid.

The plot makes a point out of claiming that women lack the "ugly" parts of man making them the better half of humanity, but at the same time that those same parts are what are needed to be a pivotal person who can maintain an interstellar stalemate to save the human species.

It's basically three books worth of words that on gender boil down to men being doers and women being lookers, and that whenever either tries to step out of their role, things go wrong.

Men only being valued for what they can do, and women only being valued for how they look, is classic sexism.