Sure, there's a few. But 3 rodent studies isn't exactly enough evidence for a layperson to worry about, either. It's not even much of a signal for scientists in that area of research.
Ivermectin is pretty safe for people to use regardless of whether or not they have parasites, so sure, do the human RCTs. Maybe we'll get lucky and have another tool in our anti-cancer toolbox.
But trying to extrapolate out that it's reasonable for people to take it for cancer based on the current evidence is premature, at best.
My point remains (and that I learned) is efficacy in rodent studies is more than just "in vitro" or quackery.
>layperson to worry about, either.
We're not talking about laypeople without money nor access to pursue. Adams had money, access, and desperation.
Society would love to put this to bed, but pharma typically avoids funding RCTs for out-of-patent/cheap drugs so we may never get the answer.