People did look into this with an unbiased lens (did dozens of medical studies, many still ongoing) and so far there is no good evidence that it has any beneficial effect whatsoever. On the other hand now a bunch of people have overdosed from taking veterinary doses not intended for human consumption (there have been thousands of calls to poison control centers about Ivermectin in the past few months, and some have died).
From what I have seen everyone pushing Ivermectin is a grossly misinformed and non-credible amateur. Some of these snake-oil salespeople may have direct financial interest, while others just want to promote their own questionable agendas, e.g. trying to undermine/disparage some extremely effective vaccines.
This is a horrible example of something “worth looking into”.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...