Why is baldness seen as an old man's disease?

[baldozer]

While in reality most of the people losing their hair are young men. If you have the baldness gene, you would start noticing hair loss as soon as in your teens. If you haven't lost hair till 30, you are almost guaranteed to keep your hair. This is because your testosterone levels and subsequently your DHT levels drop significantly after you reach 30. If higher levels of DHT couldn't cause hair loss in your 20s, why would it cause hairloss after 30? Some men do start to lose hair after 30, but that is more in the female baldness pattern, that is diffused thinning, due to the rising estrogen levels.