This is the thing,
In the past we had to say we could do anything men could do (and of course we can) because it was the only way to get ahead in a man's world, we had to say, yes we can do it, let us in.
However this came with a price - the price of pretending that we are excatly the same.
We aren't exactly the same, and now we have our foot in the door, maybe we can say, OK, now we're in the male environment, let's make it a bit more accomodating for everyone. Things like menstruation, menopause, breastfeeding not accounted for (or only a bit). Plenty of women avoid talking about their kids at work in certian workplaces as to be seen as a "mum" means less ambitious, less engaged etc (when the same is not true for dads.
The same goes for outdoors of work. I read a thing that said only men would have come up with the idea of 3 hour exams, for girls with heavy periods that hit then, it's a bit of a nightmare. White clothes for many sports, no wonder girls drop them! Temperature in offices set for men to be comfortable so women are always a little uncomfortable (on average of course). Simple little things that make life just that little bit easier for men and that little bit harder for (some - more) women.
With stuff like the army, there is no point saying the line is people with dicks / not dicks. The line is the level of strength fitness psychological resilience etc, and probably less women will meet it, but why should the women who can, and want to do it, be excluded because cunt?
That is aside from teh stuff I have read about women not having kit that fits properly, stuff rubbing, breasts not taken into account in uniform, everything to big, that sort of thing, which is one of those times like I say - minor seeming things - that nevertheless can have a big impact.