I partially agree with your and the mainstream medical view that Androgenetic Alopecia is due to genes. But there is always something called epigenetics and it has been substantiated numerous times. Environmental factors due to play a MAJOR role behind our good and bad genes.
What influences genes? What makes one generation healthy than the other? What makes Asian men less susceptible to pattern baldness?
Think about it from a birds eye view. It is not rocket science. It's what we primary put in our mouths, our stress levels, our sleep cycles, our entire lifestyle.
I love to always use the Japanese as a comparison here. Compare our diets with Japan (traditional not westernized). They avoid dairy (dairy is the culprit behind many diseases include Androgenetic Alopecia, limit meat consumption (primarily eat seafood), eat 12x the daily requirement of kelp (iodine is the source of thyroid regulation which is the source and TARGET for hair density and length), they eat more soy than any other nation (I have already pointed out numerous soy studies and how they play a role in hair growth. In fact some Japanese men are androgynous, whether it's the surplus of the phytoestrogens in soy in their diets or something else, I won't be surprised.), they drink more green tea than any other nation (numerous studies on green tea suppressing DHT, prolactin, and cortisol, and other stress hormones), and walk a lot. Their eating schedules are also not erratic.
And when you look at the U.S. what do you see? Doctors against iodine because they think it raises blood pressure (yea you morons the artificial table salt but not sea salt or pure grade iodine). Soy is poison. Yea GMO soys not organic, another moronic claim. Hamburgers, pizza, dairy, dairy, dairy, dairy, red meat, red meat, red meat, fatty foods, sodas, and other sh*t, etc. Overtime, of course our ancestors who eat sh*t food and live an unbalanced shitty lifestyle will pass off those shitty genes to the next generation. If that next generation repeats the same pattern, then those problematic genes are passed the next generation...so on and so forth.
So when you refer to genetics, it's the culmination of a prolonged healthy or unhealthy lifestyle over a set number of years that determines the quality of genes we get from our grandparents and parents. However, just because someone is born with sh*t genes, doesn't mean it's their fate. That's where epigenetics come into play which can change the outcome of your gene destiny.