Greg made an interesting comment about cancer

on a recent episode, in the last month or so. Greg made a comment about cancer and medical practices kind of to the tune of “who knows if we left it alone, the body might fight it, I’ve had at least 3/4 friends who when discovered died shortly after. Maybe it’s the poking and prodding spreading it.”
in my words, this is what I remember hearing. Can anybody recommend any episodes that speak on this? There’s a personal reason why I’m asking, so I appreciate any kind of directive feedback. Thanks guys.