I will make it simple to you .So you believe that some of us are programmed to be bald because the human body is sensitive to the most popular androgen?
In your cells you have a thing called epigeanom that protect the dna.
Every time those celles replicate they lose some of the layer that protect this dna.
When the layer that protect dna is finshed everything that can damage the cells will damge them in hair its androgens .
so now you ask how some people keep their hair ? Well as always irs genetic for some people the layer of the epigenom is way longer / getting shorter slowly…
So they keep their hair protect from androgens or basicly anthing that can damage it.
Thats is also part of the reason why hairloss is also aging condition . If we will able to reverse skin condion you will have the hair of your teens.
If that intresting for you watch David sinclair . He did expirement with mice on that . Amazing