Ivermectin is just the latest iteration of this game for people (who can no longer use the "covid's not real" talking point anymore) desperately trying to cling to something, anything that allows them to profess to be outside of the "mainstream".
If there's one thing the "alternative wellness" crowd loves, it's the thought that "I know the truth, the rest of the sheeple just haven't done the research"
First it was hydroxychloroquine...then there was mega-dosing vitamin C, then it was vitamin D, then it was zinc, then it was colloidal silver, then it was essential oils, yada yada yada.
People who are desperate to be "anti-mainstream" will continue to cling to anything that's not the officially approved recommendation, because their identity seems to be wrapped up in it.
Anti-vaccine types have basically become the hipsters of the medical science world. Drinking PBR (the worst beer), and listening to absolutely terrible music, while insisting that it's great, and anyone who doesn't agree with them just isn't smart enough to 'get it'.
Maybe people who are anti-vaccine should just start wearing fedoras, vests, growing neck-beards, and riding vintage bicycles like the actual hipsters do. That way I'll know ahead of time that they don't have anything interesting to say, and I can avoid having to listen to a meaningless, self-absorbed diatribe.