It seems that they are trying to portray the visiting doctor as being arrogant; however, he comes across as any specialist would being called in to handle a specific injury. On the contrary, Hawkeye (and to a lesser degree, BJ) are the ones who come across as being arrogant and rude towards the doctor. Hawkeye says he's BJ's doctor and resents Potter calling in a specialist when he actually should've been grateful that Potter could arrange that. He also should've been embarrassed that he didn't think of/try to arrange that himself.