It's also the plain fact that there are not enough supposedly Red Blooded American Men volunteering for all the military jobs that need to be done. (There also aren't enough military "slots" for all the jobs that need to be done, which is why we are sending DoD civilians and contractors to the war zone to do jobs traditionaly done by Joe Snuffy).
Thus, until we get a draft, we need those women. If they can do the job now, as they seem to be able to do, they could do the job after a draft is reinstated. You could even have a draft into the combat support and combat service support fields, which is were most women serve anyway. We have no women tankers, or infantry or Bradley crews. We do have women pilots, flying everything from trash haulers, to bomb droppers, including the the Big Boys like the BUFF, and the smaller fighter attack aircraft like the F/A-18, the F-16 and of course the Warthog (A-10).