Not just on MN. I don't even use MN that often but I see this on other social media websites too. If a woman shares something positive about being a housewife it's full of comments about how "being controlled by a man, couldn't be me!" "No thanks, I love my independence" or "just wait until he leaves you, then what". If a woman shares something negative about it its "see, this is why being a housewife is TERRIBLE" (yet no one would say "this is why having a career is terrible!" If a person was complaining about their job)
I saw someone earlier say they'd be devastated if their daughter wanted to be a SAHM.
Why does it provoke such vitriol? Other women choosing this doesn't force anyone else to, I don't get the complete lack of respect for people's decisions and lack of understanding that different people enjoy different things.