Because the alternative is she's hypersensitive without any reason. You can, of course, -decide- that the person is just unreasonable, rather than try and figure out what might have caused her to respond the way she did, and be empathic towards it, but it doesn't seem like it'll get you far in life.
Well, the alternative is that a lot of people around her are misogynistic for no reason, so your empathy for her means you're assuming a lot of other people are unreasonable assholes. How far does this get you in life?
