Rosen's comments have been turned into something far more than what they were. Most news sources refuse to quote her in context:
Rosen's point was just that Romney wife maybe isn't the most qualified advisor Romney could have chosen to be advisor on these issues. That just the fact that she is his wife doesn't negate that her life experiences have been very different than that of most women. Any good-faith reading of these comments would appreciate that her remark "never worked a day in her life" wasn't meant as an attack on stay-at-home moms. Rosen likely didn't have SAHM in her mind when she uttered the comment. She was clearly referring to formal work. As in "I went to work," or "I'm out of work." When people say these things they don't literally mean that no dishes are washed or no lawns are mowed at home, or that unemployed people can't also raise children. They just mean formal, paid work.
Rosen as a mother herself knows how hard that kind of work is. Also, I think that clearly you can see it wasn't spite for Ann Romney driving the comments. Rosen was responding to Romney's assertion that he uses Ann for advice on women's issues. The point was not to hate on Ann but to point out that Romney might get better advice from more diverse sources. By refusing to defend Rosen, Democrats unfortunately have allowed Republicans to get away with the notion that a Democratic pundit somehow attacked SAHM or Ann Romney, when that is not the case.
Compare the above to these comments,