Those two organizations didn’t make an argument. They simply condemned the docs. It was a political statement, not a factual or scientific one.

If these organizations want to be taken seriously, then they should rebut the arguments rather than simply appeal to authority (“argumentum ad verecundiam”). Point out the errors the docs made, if any.

Personally I do think these docs erred in extrapolating positive test percentages to the general population, because the only people being tested have significant symptoms, whereas the general population does not. But the truth is the actual percentages of people who had the virus at some point are likely close to what these docs say because the majority of those infected are asymptomatic.