I think a post natal ward is disruptive enough. I arrived on the ward about 3am, My Ds then needed medical attention.. I was disruptive enough without adding a partner in. .. I had staff in and out for the 3 days I was in, I was disturbed enough by my own DS needs, other peoples babies crying, and when I tried to sleep with other peoples visitors it was really difficult.
I have to say when I was in hospital in the 70's parents didn't stay , any care needs were met by the staff...When my DS was in hospital a couple of years ago. It was really expected I stayed . There were very few who didn't have a parent there 24 hours a day. I am glad that part had changed but if no parents stayed there would be a real problem providing basic care as wards are staffed assuming parents will be there for most.
I really am not sure what a partner cannot do during the day if they have such a desire to change a nappy or give a bottle ( assuming not BF) they can have a go in the day..night times are not for bonding...They are for getting as much rest as you can while meeting your newborns needs.
I can imagine it much more disruptive and the thought of men snoring, chatting to there partners through night feeds does not appear in any was shape or form.
My ex would not of stayed he was far to busy getting drunk.