Let's say you had a choice. You can live for perhaps 3-5 more years, flame out and most likely die, but at least those 3-5 years you can live normally, mentally and physically pain-free.
Or you have surgery, but you end up ejaculating backwards into your bladder, or possibly losing that ability for the rest of your life. Not fathering any children the old fashion way. You have to live with a huge scar that goes up from your pubic area to your upper abdominen, all those times working-out become pointless. Recovering from the hospital again, all the pain that will be faced. All this to remove some potentially cancerous tissue to make sure it doesn't come back. Not to mention all that time spent recovering.
If you could possibly imagine choosing between two hells, which would you pick?
I'm heavily considering opting out of surgery, and let nature take it's course. If you can't live to the fullest, why live?