I can only conclude that you do surgery on yourself because you aren't willing to trust the experts.
There is a great difference between not trusting experts (what you are accusing me of) and having ideas of my own and asking others for their opinions of my ideas.
I don't do surgery on myself but if I had a deadly uncured disease I would question the doctor as to why various treatments won't work to cure me. In all likelihood he would answers for all of my questions (which in itself would put my mind at ease a little), but it is possible that he wouldn't have all the answers (leading me to want a second opinion).