I would rather not have a surgeon considering failure rates ahead of any operation they're about to conduct.
1. Presumably, the surgeon has determined that this specific intervention is the best possible intervention of all the possible ones (fewest downsides, best outcome, etc). There are always alternatives - including #wontfix.
2. Once this decision has been made, I don't want them second guessing, I want them 100% confident in the decision and their abilities. If there's any lingering doubt - then return to step 1 and re-evaluate.