I have never been in the army, but I come from a long line of soldiers — father, grandfather, brothers and uncles; some of whom have been to war and others fortunately not. I agree completely with your post. The ability to defend your country when necessary should never be sacrificed to political correctness.
I think the problem for America is that your country has not been seriously threatened in living memory. The last war fought on American soil is considered ancient history in many ways. So for many Americans who have never been in the military, war is a heroic movie or a video game. It is something that happens far away and never really impacts on anyone who is not either in the military, or who has a loved one in the military. It is not the bloody life and death reality that war usually is for the soldiers on the ground.
There are famously women who fought in combat for Russian forces against the Nazis. The most famous ones are snipers and a handful of pilots. I have noticed much lionising of them in the west recently and they deserve it. But they were very very few. They were exceptions to the rule. I have been admonished by feminists to remember the “millions of Russian women who fought;” but millions of Russian women did not fight at all. Millions of Russian women made enormous contributions to the defeat of the Nazis, but almost always in non-combat roles — supply, communications etc: almost the entire medical corps was female and most of the anti-aircraft batteries too.
But at the outset of war, the Stavka, in their wisdom, decided that female infantry units would be a good idea. The first female infantry battalion in history (as far as I know) was assembled in 1941 and first saw action against the German invaders near Smolensk. Commanders soon conceded that it was not going to work. Female soldiers, they observed, were more likely to either run in the face of the advancing enemy, or to freeze up and allow themselves to be captured. German advance units, probing for the weakest parts of the Russian front, were finding it wherever the female soldiers were positioned.
It is a fact of nature that, apart from the obvious differences in physical strength, which make women less suitable for combat, women have a much more deeply ingrained “flight” mechanism in the face of danger, as compared to the more prevalent “fight” mechanism that men have.
If those Stavka officers had read Darwin instead of Marx, they would have already known that. Anyway the first (and last) female infantry battalion was soon re-deployed to anti-aircraft roles behind the lines.