What if all those sources of cancer are only cancerous because there is a type of energy field that actively tries to take over biological bodies. It is constant pressure and as such cancer will occur at any area of the body where the defenses are weakened enough.
It would support the claim how simply being in nature can totally eradicate cancer.
Looking at things from a much larger scale – do you think the “firewall” at the edge of the solar system is also a type of defense mechanism of a wounded solar system or is that normal state? It would make sense to have some form of barrier in any case.
I imagine the solar system has its own CF that restricts what kind of beings can come here on top of Earth.
So many different sources point to us being a sort antibody of the universe. Here to fight an infection. No wonder the baddies love us so much :D.