> Before injecting this cocktail into your bloodstream, would you find it reassuring to know that there is at least one human cancer expert who understands– even partially the mechanism behind this cure

I mean... yes, most people will find it reassuring, but history has proven that's not necessary. People have been using medicines of which the mechanism wasn't understood for a very long time and greatly enjoyed their benefits. Even widely used one (e.g. Paracetamol).