Wombs are fundamentally more valuable to society and always will be.

You can recover from casualty losses in a generation if you protect your ability to create more humans by securing wombs.

This is just reality, and reality is unfair.

Because that is what it was in the past, and they haven't gotten around to changing it yet, especially because (in the US) activating the draft is very unlikely.

Because one man can impregnate thousands of women if need be.

A nation can rebuild to former numbers very fast if 50% of all men die but all women survive.

The opposite guarantees a massive collapse.