FWIW for many it is also seems to be a matter of faith to proclaim that Ivermectin does not work, and this has been going on since the drug was first linked to the Trump camp.
The irrationality in this regard seems to match the irrationality of the concerns over masks in the pro Trump camp.
(I'm in the middle. Triple vaccinated, never took Ivermectin but find it really ugly that every single discussion about it ends in a flag, downvote and shouting competition that makes it impossible to find out what the facts are. The best I've found so far is Scott Alexanders findings but I guess there could be a lot more to learn if people weren't so busily either shouting or flaggind down the stories.)