............to be knowledgeable and give you the best advice possible?
In my humble opinion, most doctors give advice that is suitable for most people under most conditions. But that doesn't mean they are not the most knowledgeable in any given area (double negative intended).
Too many times, after reading up on a subject, and then approaching my doctor for his/her opinion, all I get is the stale old stuff they learned in med school 20 years ago.
For example, my doc got upset when I suggested we go from 200mg test c every other week, to 100mg test cyp every week. Does that make sense to you?
My doctor knows absolutely nothing about TB, nor MSM. (Really?)
So I have developed a relationship with my doc over the years, where I ask for prescription, and back it up with a valid reason why. In most cases he will fill the Rx, and occasionally, i'll jump his ass when he doesn't. And he has learned from me that if he has any doubts, instead of getting his ass jumped, he will refer me to a specialist.
My doc also told me when I was about 240lbs and at 16% BF, that I need to lose weight and get down to 185lbs, based on his vast knowledge and this handy BMI chart hanging on the wall.