They aren't worried that Ivermectin doesn't work, they're worried that it does.
Imagine injecting a highly toxic protein in your body and risking all the long term side effects that come with that, and then having to take another dose of poison to 'get your levels up'. And then taking ANOTHER dose every 3 months. And then having to take AIDS pills. Even after all that you still end up with fucking Covid.
Meantime some chud Trump supporter takes a tiny amount of horse dewormer once a month and never gets sick.
Humiliating is what it is.