I totally agree! I'm an MD with a BS in human nutrition and a deep personal interest in diet and fitness (which is what eventually prompted me to pursue medical school). One of my most common refrains is the paradox between the tremendous proportion of the human population that consumes food, the tremendous proportion for whom diet strongly impacts health, in contrast to the tragically small body of truly rigorous, adequately powered, properly controlled, sufficiently longitudinal, non-surrogate-outcome'd research on the topic.

It's also surprising how many on HN seem more willing to accept my half-baked self-taught opinions on tech topics than they are my opinions on health. ¯\_(ツ)_/¯