Speaking just for the MDs in my family, they have been taught to believe the medical journals and their research. They have been taught to trust the CDC and their reports. They have been taught to trust the big institutional research centers. These three have one thing in common: They rely on Big Pharma funding and so their reports are in keeping with Big Pharma interests.
Our extremely bright MDs are very good people reliant on incomplete information. A few have broken out of the matrix, but not enough.