Not jumping on the latest fad is very common, and something I expect of a doctor. However, I wish more doctors I've met fit in with the latter part of the grand parent comment, though.

A friend of my family met 15 different doctors for a period lasting years because of agonizing headaches, they all sent her home thinking it was nothing unusual. She died of a brain tumor the size of a tennis ball. We often think about what would've happened if one of those 15 doctors would've shown some humility.

To be clear, I work in tech, we have more than our fair share of big egos too. I don't think this is anything particular about doctors.