That would still apply, but the problem with war and firefighting, is that failure to perform adequately, is deadly.
I was not very athletic or overly strong, but I had to pick up the slack, especially physically, for many female soldiers, especially in the field. My specialty was and is very female-heavy, so this became a huge pain in the neck for male soldiers within it. As many of the section chiefs, company commanders and such were also female, there was little to no recourse. Maybe that’s why PFC Manning wanted to be a girl...