If this observation or assumption is accurate, then my view is correct that cancer is a misdiagnosed illness. It is a microbial (parasitic) infection. Therefore, ivermectin seems to work as it is a drug usually prescribed to treat parasitic infections (link).
“Ivermectin is an anti-parasite medication used to treat parasitic diseases. It is FDA approved for use in humans to treat a variety of parasitic infections including parasitic worms, hookworm and whipworm.” (link.)
Please have a look at the actual science (https://bioanalyticx.com/medical-science-and-its-fraud/)
More on my view:
Is Cancer An Illness Or An Imaginary (Misdiagnosed) Thing Like Viral Infections? link
Turbo Cancer and Ivermectin and Fenbendazole – A Good Match (link)