> Other commenters are correct that large randomized trials will be more definitive.
The reason they aren't doing large randomised controlled trials is because the hydroxychloroquine itself is killing people, and it's unethical to continue.
People have said they'd rather have malaria than take it, and that should tell you something. The side-effects for hydroxychloroquine include death, which is not immediately obvious from reading HN.
Doctors aren't just making this up and ignoring evidence, the drug is bad, and not effective for covid-19