I understand why people want to have their partners with them, I've been there where there was no support from midwives through the night, and I was ill with undiagnosed retained placenta, anaemia and a bowel blockage. At that point all I wanted was the support of my partner, at that point I probably didn't even consider the other women on the ward, I was desperately ill and just wanted to lie in bed. I don't think that women should "just get on with it", because sometimes it isn't as easy as that.
I still don't agree with allowing men to stay on a ward of post-birth women and babies, I think the way things are right now in general aren't great for women, adding partners only makes it harder for many reasons mentioned in thread.
I think wards where sharing is the norm don't work very well for the purpose of caring for women after giving birth, other than in very broad medical terms. I've experienced just as much discomfort from being around other women strangers as with other male strangers. I hate that it is deemed necessary for me to be in a hospital setting to give birth, because the whole experience isn't pleasant to me. The more privacy I had, the better it felt, and privacy is hard to come by when all that separates you from everyone else is a curtain. It's definitely a lot easier to forget the rest of the world when you are in hospital ill, rather than simply just exhausted after labour with a very active, very loud baby.
It was easier when the midwives were able to help me out, as opposed the the first experience when I was ignored for hours and couldn't figure out a nappy and was panicking because everything was a huge challenge because I was feeling so awful.
I'm not sure of the answer, if it were simply to have a homebirth for me, I'd do that without second thought, but because of complications I don't even think that is possible for me. I just know that with my second, I had no partner, and even with men not allowed to stay overnight, I found the ward setting difficult. I would not want that added to with partners as well.