2x cancer survivor here. It's not a binary choice. The melanoma was chopped out and I was closely monitored for 10 years. Would have killed me in a year or two if I did nothing. The colon cancer was chopped out through an 18" resection and I've ridden 10 centuries in the three years since. Spent two weeks in the Canal St. Martin neighborhood of Paris with my partner. Had a bunch of other lovely trips, remodeled the house, cooked a thousand lovely meals. Nope, I think if/when the crap comes back, I fight it again.