I would venture to say being a mechanic is easier because there is a definite right and wrong way to do things. People built cars, we know how they work, we know the things that can go wrong, and we know how to go about fixing things. The human body is still largely a mystery- there is not mechanic's manual for the human body, and even with the thousands of books and millions of articles we have published on the subject, we are still largely in the dark as to how so many disease processes work. Worse yet, we don't have the drugs, treatments, or surgeries available to fix many conditions, while mechanics can always buy a new part for whatever happens to break.