I agree with the point you're trying to make, but perhaps doctors aren't the best representatives of the scientific establishment. Medical practice today is still as much art as science. There is a significant amount of underlying science but many areas are still poorly understood. So doctors rely heavily on customs, guesswork, and intuition in areas where no reliable scientific data exists.
And the situation in medicine is exposed to additional confounding factors - the placebo effect exists (for both faith healers and doctors) and (at least for doctors) has been getting stronger: https://www.scientificamerican.com/article/placebo-effect-gr...
So the effect of the ritual of seeing the doctor and undergoing treatment has increased in strength, possibly as people have grown to trust doctors more.
