I am not surprised, despite all the science courses taken by pre-meds and medical students, very few of them really think like scientists (not that scientists do all the time, either). They memorize what they are taught and too few unlearn when they need too. I am very careful when selecting a physician to look for one with a publication record (I work near a research hospital and have that luxury). I find they are more willing to consider new evidence. It does not hurt that I am a biology PhD and I am more up to date on some of my conditions than they are. It sets up a different power dynamic, and not all of them are ready for that.