Well you can't whip out your dick at morning muster anymore, for one. It just changes the dynamic. All men is brotherly. Swapping out crew to make 10-30% woman now adds a different dimension. Who is trying to fuck who. This person causing drama with this person. ETC. What happens if somebody gets preg-o on a 6 month nuke patrol. So many examples to list. All men is just more simple.

If we trust these people to not initiate nuclear disaster/apocalypse, is it not a lesser trust to ask them to conduct a professional modern workplace?

Having the keys to nuclear disaster sounds like a good reason to not add additional workplace stressors.

M8 they are sleeping in eachother's beds and smelling eachother's breath for 3-4 months at a time in a 10 x 170 meter tube underwater. Something's gotta give. Surface Navy is fine for mixed gender now it's become very political. Subs are not the place.

People are people. They aren’t infinitely perfectible.