Some doctors are like you're describing. I posit that the best doctors are ones who realize that the domain of "health" is broad and encompasses things that aren't germs.

Geiger believed that the greatest threat to public health of his day was nuclear war, so he founded an organization (Physicians for Social Responsibility) to try to stop it, because he thought that would be more effective than waiting for the bombs to fall and trying to treat the victims.

You can disagree with his assessment, or the efficacy of his methods, but it's pretty unfair to dismiss them as "nonsense".