I think there are two categories of humans who don't really understand how women can totally become depressed about hair thinning/loss: men and doctors (although I suspect some female doctors will be more sensitive than the ones I've had).
To us, hair is part of our identity, moreso I think than men who hear about male hair loss since their young, see male role models go bald, and can shave their heads and be considered manly-stylish.
Women do not expect to lose hair. We're valued for lush, beautiful hair moreso then men. We see hair as our "crown of glory". When it starts going away, it's traumatic.
When my sis was diagnosed with lupus and started having thinning/bald patches, *I* was the one who wept with her about her hair. Her husband wouldn't get it. Guys wouldn't get it.
Doctors are so used to being preoccupied with more urgent matters in terms of "life or death" or severe health issues, that hair loss probably seems insignificant from a MEDICAL view other than being an indicator of some endocrine or other issue (or a side effect). It has value as a symptom or indicator, but prolly not much else, unless they make moolah off selling products. Otherwise, to them, it's cosmetic.
And I understand that--when you have patients with disfiguring, life altering diseases or terminal ones, hair loss can be seen as a non-issue, a minor irritation.
To us, it's horrifying.