Because it's possible that the way our society behaves and judges success is modelled more after men's natural inclinations and needs than women's, and that the liberation of women was seen as women pursuing the same goals as men do, when perhaps it should have been women pursuing slightly different goals.

It's possible that feminism as a movement overshot, a mistake that's easy to forgive. Women needed to be made free, badly, and in that feminism drove incredibly important changes. However, many have come to believe that applying equal success standards for woman actually doesn't pay enough respect to women's distinct needs. It's possible that men and women, on average, just don't experience well being and meaningful lives from the exact same things.

In a way, the historical ideals of feminism may be another act of chauvinism - applying the standards of men to women (instead of say, applying the standards of women to men). Perhaps "real" feminism should acknowledge that men and women have distinct enough needs to not be judged according to the same standards of "success". Perhaps, it should be acknowledged that equality means equal rights, not equal needs or equal desirable outcomes.