My paternal grandmother had bad eating habits.  Red meats, processed foods, junk food, excess sugar, salt, fat, no fruit or vegetables, cooked and baked with lard -- you name it.  She lived to be 90 and she didn't have cancer.  Actually, cancer is almost non-existent on both sides of the family.  Now heart disease is another matter.  But hey, I guess we are all going to die from something.