Seems that we fundamentally disagree, but you're not understanding the crux of the issue. In an ideal world, we'd have researchers working on this. But, as I've said multiple times, since hairloss is considered to be a cosmetic condition, the government doesn't give many grants nor does it mandate insurers to cover this. Therefore, scientists don't have the funds to pursue research.
Therefore, in this imperfect world, the next best choice are hair transplant doctors. And hair loss doctors understand the mechanism of hair loss a lot better than you think -- without a good understanding, they wouldn't be able to prescribe meds.