It would seem to me that the linked study is another of the studies that the AMA noted are researching the drug for Phase 2 and 3 of COVID-19, whereas the treatment is being touted for use during Phase 1, prior to any type of hospital admission being necessary.
I do worry about the findings though because at the end there was this entry "A randomized, double-masked, placebo-controlled trail across the United States and parts of Canada also concluded that hydroxychloroquine did not help prevent illness when used as postexposure prophylaxis for COVID-19.
If you go to the trial that they cited, it says the following "According to a protocol-based treatment algorithm, among hospitalized patients, use of hydroxychloroquine alone and in combination with azithromycin was associated with a significant reduction in-hospital mortality compared to not receiving hydroxychloroquine."
I find it odd that you would cite a trial that disagrees with your own findings and characterize it in a one line summary that supports your findings. Is this common practice in the medical research field?