Imagine you are a doctor. You worked incredibly hard and made huge sacrifices to become a doctor. You are so far in debt it's mind-boggling. When you tell people you are a doctor you see the look of respect in their eyes. You have an almost superhuman amount of knowledge, from anatomy down to the cellular level. You've already forgotten more than people like me will ever know. Now it's your turn to get rich and in an altruistic way. That is, by "making people healthy". Then someone comes along and says hey, I can fix my own gall bladder. I don't need a doctor for that. And this guy hardly even knows where the gall bladder is! Do you listen to this joker on the 'long shot' that he is right and therefore can cost you a lot of income? I think that's a lot to expect of many human beings. I can empathize with such a doctor. He needs to pay off his medical school bills. He needs to believe that what he learned in school is right and that nothing important was left out.
But the hard fact is that you can't please everybody all the time. If you try, you'll just look like a fool or end up resenting the bad advice you felt pressured to take. A lot of people have given you a lot of good advice. Why not take it, and postpone the surgery?
All the best,