The issue is that there aren't any studies showing that safe doses are effective for treating this disease in humans. The studies on monkey cell cultures are what they are, but nobody seems to be noticing that the dose you'd have to use to get those effects in living humans is unsafe. As a rule, medicine should be more likely to treat the illness than to kill you. If my doctor prescribed Ivermectin, I guess I'd take it, but if my doctor prescribed it at this point, they should get their license revoked.