Where do you think most of the people taking ivermectin heard about it? They probably have no idea how ivermectin would actually work, but heard it from some conservative talk show host that they trust more than scientists backing the actual COVID vaccine. I'm astonished by how totally backwards all of this is.
Everybody I know personally who did not learn about it from me learned about it from Eric Weinstein on the Joe Rogan podcast.
A good friend of mine watches Fox News no less than three hours a day and took both Pfizer doses months ago.
I suspect you might be projecting, and perhaps you learned about Ivermectin from a neoliberal TV show. Most of the people who believe in the safety and efficacy of Ivermectin believe so precisely because they are not consuming television propaganda, and so they are still able to form their own opinions from real information.
I do think people also form their opinions of the COVID vaccine on real information. I personally consulted someone I know who has a PhD in Molecular Biology to gather more information on the mRNA vaccines.