“The only thing you can observe from that observational study is that Hydroxychloroquine-treated patients that were more severely ill, DIDN’T Do better than Non-treated pts. of HCQ.”
That isn’t what the study showed and by making the comment you show that you did not understand the methods used in the study. It showed that Hydroxychloroquine-treated patients who were in the SAME condition as the untreated patients did not do better. They used three different methods to make the treatment groups equivalent and got the same result all three ways.