At what? A fight, a race, a hike, what? Not trying to be a dick, but that matters. Also the logistic requirements change when there are females in a male environment. Requirements change, costs go up. Is the increased cost of the support structure justified for the purpose of 'giving someone a chance'? Enough for that one woman in a Ranger company? "Be all you can be" is a recruiting tool, recruiters lie. The reality of military service is "Be all we want you to be" or the Corps "We don't promise you shit, but we give you plenty anyway."