Why are so many people brainwashed to think baldness==bad? My hair really started to go down around 30 years old and am going to have to shave my head at some point, but who cares? Why does it matter?
However the way the brain responds to it is incontestable, and no amount of body positivity will change the impact it has, thus for an individual it makes much more sense to pay a few thousand to conform to beauty standards than hope that everyone you meet will turn off their primate brain when interacting with you.
More directly, at the risk of a handwavey evo-psych just-so story: Hundreds of millions of years of evolution, perhaps? A ton of characteristics driving attraction are signals of health / youthfulness. Weight, musculature, nice skin, good teeth, etc. And yeah, good hair! Male pattern baldness is definitely associated with aging even though many people will probably spend more of their lives follicularly challenged than they did with good hair.
More sun exposure, less cold protection.
It has benefits too, but it's overall harmful.
If you need your job and income, taking steps to prevent facing this bias can be beneficial.
If it makes someone feel happier to not be bald, great. It should come from making them happy, not them having to avoid social stigma though.
I'm not unhappy with how I look. I'm happier after a haircut and a hot shave. Sometimes we make choices because they take us from "whatever" to "this rules".
This forum believe the silicon valley delusional tech executives saying we'll soon extend lifespan to 150+ years thanks to "ai", it's a transhumanist echo chamber, a hair transplant is nothing, they'd sell their parents for a neuralink chip