I'm not sure if this is exactly what you're saying, but I agree that whatever causes hair loss does not just cause hair loss on the scalp. It causes it throughout the whole body. Whenever I used finasteride, for the brief period of time that it would have incredible effects on my hair, it would also have those same effects on my beard and body hair. My beard and body hair got thicker and darker along with the hair on my scalp. So, this notion that there's some kind of paradoxical association between hair on the head and all other hair, to me, is just false. Are androgens required for body hair? Certainly, it seems so. Are androgens responsible for paradoxically causing more hair growth on the body and inversely less hair growth on the head? No. Definitely, no, in my experience. I've lost hair on my calves and I think it's the exact same cause as the loss on my scalp.