My dad is a doctor and has been practising sine the late 1950's (He's 74 and still working)
He is the first one to say some doctors are arrogant and overbearing.
Whats more, they are with each other!
Doctors often have to consult with each other (especially specialists) and unless they are co workers, they often have little respect for other physicians.
Just ask a nurse (any nurse) what they think of doctors and you'll get an earful.
Mind you, if I spent 10-15 years in training, I would be an arrogant prick, too.