This is disingenuous for two reasons: (1) where else does proof come from if not from experts in their respective fields? and (2) various forms of crackpot denialism persisted long after proof was (repeatedly) given.

People were peddling horse dewormer as a COVID treatment even after multiple studies that demonstrated no benefit.

It's disingenuous to group one group of trust the experts as proof and the other as crackpot. Both groups blindly believed claims that a new treatment or repurposed drug would prevent covid. In neither case did it work.

I did the scientific way of not contracting coronavirus: isolation. Neither the dewormer or the mutiple experimental shots were as efficacious.