If you are asking me to comment on: "America's Frontline Doctors' may be real doctors, but experts say they don't know what they're talking about".
Sounds to me its sparring between 2 groups that may or may not know what they are talking about. I have heard none of the frontline doctors mentioned work in an ER or ICU. I haven't verified that, just heard that is the case.
As for the experts in the ivory towers at the CDC, I think I have been pretty clear what I think of them, and it ain't too good. They have presented many things as facts that they have had to retract or change as COVID has progressed.
As a new disease, there was no good information about COVID available in the beginning, yet the experts presented their opinions and guesses as scientific fact. In the case of a new disease, I would not expect them to know anything. I would want to hear their opinions and guesses as to how it might behave, but I would like them to not lie and tell me its fact.