We grant doctors a great deal of respect for their expertise. It takes years for a physician to become qualified to work with patients and they acquire a level of understanding about the practice of medicine that the rest of us will never have. Therefore, when doctors are called upon to testify in medical malpractice cases, their opinions can carry a lot of weight with juries and judges.
It would seem to make perfect sense to trust the assessment of doctors when they testify in court. Unfortunately, according to a retired surgeon, we may need to start casting a more skeptical eye on the testimony of doctors.