Using doctors to provide that information is not insanity, because it's likely that people will take it more seriously if it's from doctors. "Lifestyle educators" aren't trusted like doctors are.
When I was doing primary care, I actually enjoyed talking to patients about nutrition. I can expound on the topic for hours at the drop of a hat. I went to Med school at Tulane (where Dr. Harlan is). But even in the closed system of active duty military, it's hard to believe the time paid off because I rarely saw the patients again. They'd schedule follow up and no show. My clinic schedule would change. They'd deploy. I'd deploy.
Do I eat better? Yes. My family? Probably. Anyone else? Long term? Studies say maybe, but I just don't know.
