I agree with all of the above but would just like to add that there is something else going on. Medicine is a business, just like any other, and many of the more successful TRT docs and clinics would just as soon not have every last family practitioner and internist know what really works.
Publicizing your successful protocol may seem like shooting yourself in the foot.
End result: the doctor "on the street" doesn't have a clue. (And they didn't didn't teach this in medical school.)
Additionally, "big pharma" has invested dollars in patches and gels, and they're going to market them heavily to urologists and endocrinologists.
Thus you see very little published about what should be the "gold standard" of care for testosterone deficiency: the triple therapy of SubQ Testosterone, HCG, and an aromatase inhibitor.
Eventually someone will publish a paper and it will become conventional medical wisdom, and all those TRT and Aging Clinics will come out of the woodwork and say, "that's what we've been doing all along!"
(I'll introduce myself in another thread.)