I think its worthy to realize that there have been tens of thousands of doctors all around the world who have been treating people with Covid for the past year or more and yes there were some who tried using some experimental treatments but through those efforts they didn't find the magic drug that would successfully stop people from dying.
Do you not think that many doctors haven't reviewed and evaluated drugs such as Ivermectin ???
Remdesiver on the other hand has been approved as a treatment for Covid symptoms here in Canada and the US but then again its not completely capable of stopping possible outcomes of death.