For me, the difficulty of quickly digging holes for the 155 spades during a quick-fire when seconds counted was an obvious point of impossibility for the female, also the fact that I could single-handedly remove, carry and set a spade demonstrated the extra possibilities and depth gained by having all-male crews.
I always hated to watch those things: men running, heavy tube, Travel Lock, trails, spades, wheels and firing platform all moving at once, sledgehammers, long pry bars, shovels, dust flying and my Battalion Surgeon standing by.
As far as I know, only the Marine Corps still thought that the 155 was an adequate expeditionary direct support artillery system. With the old M101A1, we could fire the first round in a hipshoot in 30 seconds and fire fore effect with the whole battery in one minute.
Honest.