>>>>Women have higher stamina.
>>>
>>> I think this is generally accepted that female bodies do have a
>>> higher stamina level.

>>which explains why all those women win the Boston Marathon every year.

Don't women run in their own division for the marathon? Women are not
part of an infantry unit, they along with others serve in a logistics
support status. They are not serving as frontline grunts. Being
assigned to an infantry unit does not make you an infantryman.