From the glorious XKCD, of course. But there is, perhaps, an underlying message. If you only have a hammer, perhaps everything looks like a nail. Surgeons do surgery, they tend to see conditions through the lens of their expertise - as indeed, we all do. While surgery may help, they may lack the knowledge to dispassionately assess the alternatives. Because of the nature of their work, they command much respect and are used to delivering opinions with confidence. The effect can be daunting, but it is always worth remembering that you are allowed to shop around. Medical insurance helps considerably in giving you that ability, too.