It is a statistical fact - one rooted in the biology of human behaviour no matter how much the feminists wish otherwise - that females are, on average, much more prone to empathy, and less inclined to violence, compared to males.
Further, the way those traits are distributed in a population means that even small differences in the averages amplify further out in the distribution, so when it comes to pathological altruism (e.g. Stockholm syndrome), women vastly outnumber men.
Which means that not only will women as a population be far less effective in combat compared to men but they will be disproportionately scarred and made miserable by the experience of war compared to men.
There will be some women - their numbers significantly less than men notwithstanding- - who can pull the trigger and kill the enemy without any qualms. There are Kurdish women who are fighting the orks of the Caliphate to the death as we speak.
Thus while I have no problem with women who genuinely want to join the military doing so - it is clear to me that the costs of a female draft far outweighs any benefits, if there are any.