On the off chance you're not being facetious: why? Isn't it part of their job description to weigh the ups and downs of any operation before conducting it? I'd imagine failure to do so would open them to liability.
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.
