That doesn't prove that Hydroxychloroquine is not effective. Aquarium cleaner is NOT malaria pills.

COVID-19 is NOT, primarily, a respiratory sickness. The breakdown of the lungs are the effects of the attack on red-blood cells. It attacks the blood first.

The lungs are the organs most affected by COVID-19 because the virus accesses host cells via the enzyme ACE2, which is most abundant in the type II alveolar cells of the lungs. The virus uses a special surface glycoprotein called a "spike" (peplomer) to connect to ACE2 and enter the host cell.[66] The density of ACE2 in each tissue correlates with the severity of the disease in that tissue and some have suggested that decreasing ACE2 activity might be protective,[67][68] though another view is that increasing ACE2 using angiotensin II receptor blocker medications could be protective and that these hypotheses need to be tested.[69] As the alveolar disease progresses, respiratory failure might develop and death may follow.