I think the most useful lens to understand the sociology of these kinds of questions is religious belief. And there is no shortage of people out there who want to convince others of their belief.

The narrative for "the Ivermectin story" is particularly compelling, as it involves brave maverick doctors working selflessly to get the word out, suppression and censorship by shadowy organizations (big pharma fearing competition, the big Internet companies just lusting after the power of thought-control), and the empowerment of people to take medical decisions into their own hands.

Incidentally, this was the exact same narrative as HCQ, and is being pushed by a lot of the same people. The end of the story may turn out differently, as the evidence on HCQ is overwhelming that it doesn't work, so you only see dead-enders pushing it, but there is a good chance that Ivermectin will turn out to be at least moderately effective, though the jury is still out.

How about having a discussion? Not everything has to be so complicated lol