Have a read before you declare it to be crackpot, John. Look at how it works in antiviral applications, it's not spurious at all. As I daresay you know it's the "cytokine storm" which finishes people off, and IVM does act against that, with understood mechanisms. If I hadn't had a vac and was in ICU gasping, I'd want it.
It's been used for 40 years. That's something you can't say of the vaccines. This
https://pubmed.ncbi.nlm.nih.gov/22535622/ discusses its use against yellow fever and others, 9 years ago.
I'm pretty confident there won't be any serious post-vaccine problem raising its head in years to come, but it's like the producing-a-baby joke ; you can't do a 10 year test by testing on 10 different people for one year.
I find it unsettling that the attitude to IVM is a blanket, "NO, because it hasn't got an approval".
Paracetamol doesn't have an approval for use against Covid 19 either! Nobody's saying you can't use it.