They are cowering after being threatened either directly or indirectly with the loss of their right to practice if they don’t push the agenda
They are threatened with loss of job and income first by their employers, the big health care systems. Then, if they don’t toe the line, they are threatened by the licensing boards with loss of their profession.
I experienced this myself. Early in the pandemic, there was lots of information from many doctors about the benefits of Vit D, quercetin, zinc, etc. I asked my doctor what he thought of the emerging protocols. His reply was “Follow the CDC guidelines.” It was at that moment I knew what was really going on. He was either completely cowed by his health system employer, incurious or just plain intellectually lazy, none of which are good characteristics in a doctor.
Hopefully the guilt will eat them up.