What a load of BS Riddlez. Women make better soldiers because they're not as aggressive? Hahaha
I've never heard of grunts being deployed as diplomats or whatever, but I'm sure in a counter-insurgency operation in the Middle East that Abdullah the village elder would love to talk to a white woman.
The 'muscle mass thing' and fitness are still the main requirement for infantry. Your solution to that is what, put everyone on motorised vehicles? In the Falklands War the ship carrying the helicopters was sunk, meaning the British had to march c100km in three days carrying full equipment across marsh terrain. Doubt many women soldiers could have done that.
I'm not disputing that women can fight if needed, I'm saying they're not very good at it compared to men. Human evolution has not prioritised the fighting role of women, they're not as strong and they're frailer, these are biological facts. Supposing all else is equal, a homogeneous male army will always defeat a mixed one. Though granted a woman being driven around on a truck carrying supplies can probably be relied upon to fire off a few rounds when needed it doesn't make them as effective as men.