You need to compare apples with apples.
I'm guessing there are as many wives who would stay with husbands who have mental breakdowns or penile/prostate cancer, as there are husbands who would stay with wives who have mental breakdowns or breast/uterine cancer.
Identity issues are entirely different. Sexual and gender identity are fundamental building blocks of who we are as humans and it is very difficult to change one's sexual attraction. This doesn't mean that wives cannot accept, but the ones who do need to be appreciated, and the extent to which they can accept needs to be respected.