Post Truth World

That isn't what Trump said.

It is - https://www.youtube.com/watch?time_continue=76&v=yYhriqvJMSw&feature=emb_logo

and later Dr Fauci explained the difference of opinion here and I think that difference between "hope" and evidence matters.

https://www.youtube.com/watch?v=dqE3bKRgY6o

Fauci said they're trying to find a protocol to test it.

Trump said he's a fan of it (he hopes it works), immediately afterwards he says the doctor is correct.

Is it wrong to hope something works?

Here's a direct quote for your meme "it may work, it may not work" 1:45

Or more simply whatever Trump says

But , it is working

Actually the Dr is wrong. Whether he was not aware of recent research and small sample testing I dont know.
But Hydroxychloroquine the drug referred too has been found in at least 2 small samples to be 100% effective in the elimination of covid 19. If I recall correctly, It works by attaching a zinc ion onto the RNA part of the corona virus and this is believed to be the action by which it doesnt allow reverse transcriptase dna to replicate. Thereby stopping the virus from replicating it is a cure and the remaining virus in the body is eliminated by the body itself. WIN WIN.

Dr wasn't wrong, he stated it was "anecdotal." Unfortunately the study was of only about 20 people. That simply is not enough for scientific muster.

The point is Chloroquine is one to be studied, along with other antivirals like lopinavir, arbidol, ritonavir, remdesivir, camostat mesylate, etc may either be effective or hold the key to stopping it and to herald Chloro is just another in a long string of oversimplifications Trump has made. If he was just talking at the bar it wouldn't matter, but from the position of president, what he says does matter, nuance matters, clarity matters.