And if all else fails, the built in "get out of jail free" card, in the form of a pregnancy, can intervene.
“But if a woman WANTS to do grunt work (up to and including combat), she certainly can. But only if she wants to.”
I’m afraid “wants” should have nothing to do with it. Any person should only do work in the military that they are capable of doing. Otherwise, they are a danger to their teammates.
Letting people do jobs that they are incapable of doing because they wanted to and no one had the balls to tell them no, is one of the reasons we are where we are.