Cancer myths

Hope everyone is having a good weekend.
Here's an interesting article about various cancer myths (from the Mayo Clinic). Let me know what you think, about any or all of them. (You can generally spot a myth--regarding cancer or anything else--when it starts off "Everyone ...") In sum, there's such a mystery to illness. Of course, doctors and other health care pros have studies and smarts to rely on, and I appreciate them no end; but some of the smartest ones, to me, are the ones who say things like, "We don't know. Let's try this. If that doesn't work, we'll go to something else. ... Hang in there." If there's no art or mystery to treating big-time diseases like cancer, how do you explain why some die (who are "supposed" to live), and others live, who pretty much have been told, "Don't buy ripe bananas"?
Meantime, does anyone know any treatments we can try for Evil Cat? Last night, he latched onto my calf with his MOUTH (as in teeth) and it seemed an eternity before he let go. This was unprovoked, but did not go unpunished. Two words: Water bottle.