I don't think we understand cancer well enough to make that call.
It seems to me that it's likely to me that it's allowed to proliferate by our toxic load and/or parasites.
If I was concerned by cancer I would probably switch to a carnivore diet. I would also start consuming CDS, ivermectin & some other antiparasitic (the name escapes me). I'm already careful about the toxins I place in my mouth & on my skin.
Our bodies natural state is health & vibrancy. I don't think sugar is the evil that some believe. I also think many have metabolic issues caused by too many unstable fats in their bodies.