A great point that's simply too obvious to ignore.
If it's all about equality, then why is it that women are held to a different physical standard then men? When I went through USNA, there were different physical and academic standards for men. The disparity in the physical standards was the most obvious: a lower wall on the O-course for women, for example, or the passing times for the Halsey Hack - a time that would give a man a "D" would be an "A" for a woman, etc. Even the academic standards were different, though these weren't as apparent . . . but they'd struggle to keep a woman whose academic performance was sub-par a lot harder than they would for a man whose performance was sub-par. Saw it happen.
That said, there were women there who could abide by the male standards in terms of physicality: these were the, um, manly women who threw shot on the track team, say.
That said (2), even if a woman was capable of the same performance as a man, you take normal, red-blooded young men and women and put them together in tight quarters and intimate settings, and nature will take its course. You have to be prepared for the consequences of that.
(In all the years the Navy has put women on ships [about 30], the suits and admirals have yet to figure out why a certain number of females in the crews get pregnant during the cruise. Yup, and the majority of the pregnancies weren't caused by pre-deployment sex. USS EISENHOWER (CVN-69) didn't get the name of “The Love Boat” without a significant number of reasons. This is only one ship of many and Navy officialdom doesn't see a problem? Duuhh.)