I am not saying that If you have poor cranofacial development you will lose your hair. I am saying that it's a predposidition. The worse the cranofacial development, the higher the risk of baldness. People with poor cranofacial development can still have their hair but people with good cranofacial development can't have the condition.
I havecgood cranofacial development and I am still thinning
Why do you think that scientist haven't yet discovered the gene that causes male pattern baldnes. Because male pattern baldness is not a trait that is dependent on a single gene. It's dependent on various factors.
Many processes in our body are not caused by one specific gene, that is true. But that does not make your theory true. male pattern baldness is caused by a negative sensitivity of the hair to androgens leading to a cascade of other processes that eventually cause miniaturization. Most of the working treatments work by attacking male pattern baldness via androgens. Last time I checked, dutasteride does not change cranofacial development.