Huh. I can definitely see your point (and, yeah, the disaster part was underplayed, which is a shame, 'cause I like apocalyptic and post-apocalyptic stuff). However, I take the view that men and women are basically the same mentally*, at least to start off with (cultural conditioning being accountable for the differences in behaviour that do exist), so I didn't see/notice anything amiss.

...although, mind you, the fact that virtually all the characters grew up being conditioned in the same way as people in our world means that there should logically be some sort of difference anyways. But maybe the writers depicted there being no change because it seemed less sexist than the alternative? I dunno.

*One sex may be somewhat more likely to be good at one thing or have a certain personality trait, but I don't think there's a strong enough trend for it to be much more than a statistic curiosity.