Submarines aren’t like surface ships.
You are quite right. A great understatement also. An attack or missle boat in combat is no place to test social theory. The reason a carrier can have women is because there is enough space to provide social privacy. There is NO privacy on a submarine as a design function of the extreme conditions under which it must operate. This is not the Air Force where everyone gets to go home after action. In wartime, the boats are committed to 3-4 months submerged- their purpose is to remain undetected and a deterrent force against enemy vessels. Here is an example of the kind of operational quiet that is observed: a submariner had an infection/need for surgery that could not be handled on board. Encoded messages set up a precise, timed rendevous off Iceland with a chopper. The chopper was on time, the sub was late, and took too long on the surface transferring the sailor, revealing it’s position. The sub’s captain was relieved of command for exposing a major part of our defense to attack. So, if you add in the particular screening of these submariners and mix in the two sexes in this kind of world—who, in fact, would serve— not the tough stable family men who make up the backbone of this elite service. What husband would want his wife serving with other men in such confined circumstances and what wife would want their husband to do so? The most important navies of the world have already tested this— and they do not do it.
I was referencing the Cary Grant movie.