It is important to remember we also do not have evidence of no efficacy for chocolate milk.
Yet we do not waste our time testing it.
Yet we do not waste our time testing it.
To address the elephant in the room: yes, Trump did come out in favor of hydroxychloroquine, but his opinion on medical issues is literally meaningless noise in both the informational and auditory senses of the phrase. We certainly shouldn't be pursuing hydroxychloroquine because Trump said to, but there are other good reasons to at least investigate it.