HCQ is already the recommended treatment for certain cases in many countries, including the US. Here is a super interesting conference call from UCSF: https://youtu.be/bt-BzEve46Y?t=3194
the goal of studies like this are to strengthen the evidence base and remove those unknowns, so physicians can make evidence-based decisions. if the study is sufficiently poorly designed, it does not accomplish this goal, and can even lead to misinformation