Maybe this is a bad take from someone with no military knowledge, but I never understand how "we need bodies for the meat grinder" so let's do conscription is often only mandatory for men?

You're either going to shove a gun in their hand and point them in the direction to shoot, have them run some equipment/weapon, or have them in a support role. Both men and women can do those things equally well.

Any very generalized physical differences between men and women would have minimal difference in the ability to carry out their tasks.