As a retired career Armor Officer, I have served with many fine ladies during my time, all in non-combat arms branches. There is a lot more to being an armored crewman than just shooting and I doubt there is much different in hand/eye coordination these days with all the video games. How about breaking track, changing roadwheels, humping ammo for a 120mm gun and countless other tasks that require a lot of upper body strenght? Everyone on the crew has to pull their weight. As you know, women with child are not deployable. You can get away with a lot if you only intend to fight counterinsurgencies. I bet the Chinese and Russians are laughing themselves silly.