"People tend to feel themselves intellectually inferior to anybody with a title, especialy when the title is framed and hanging on the wall. In general, the less formally educated people are, the more they are impressed the degrees, diplomas, and certificates of others. Those who feel themselves deeply infereior are often so overwhelmed that this awe extends even beyond the area of expertise covered by the title. More commonly, people simply do not question another's expertise if the expertise is backed by a bunch of degrees. Example: your plumber probably knows as much about pipes and welds as your Doctor knows about bodies, but you wouldn't let your Plumber march into your home and do anything he wanted to, would you? The chances are that you would follow him around , watching him every step of the way. Also if you felt his work wasn't good enough you would call another plumber without a moment's hesitation. But those same chances say you trust your Doctor and would not dream of second guessing him. You're aware that plumbers vary in competence, then why should not the same be for Doctors? Besides ones body is far more important to your well being than your kitchen sink. So why do you trust your Doctor so far out of proportion to his expertise ? Could it be becuse he can write a title after his name?"
"Brain power"
-Marilyn Vos Savant