Yep. It wasn't likely - you wouldn't need only a training pipeline full of women but ones who were already qualified and experienced - E3 through E8 and department-head level officers. They're just not there. And you can't run a submarine without them.
Even now, after five decades of coeducational experience in the surface Navy, it'd be tough to run an all-woman ship, at least for very long. The simple act of manning (sorry) a ship from the pool of existing sailors precludes that sort of selectivity - people qualify, are promoted, transfer in and out, leave the Navy for civilian life; it isn't a static problem. Maintaining readiness under that sort of flux is the Navy's primary personnel challenge.
I do see that Nuclear Power School graduated some women last year. That's a start, but it's a very small one. My congratulations to the graduates - that's a really tough course.