When talking to the patient, many doctors do not make eye contact, are not attentive, and are very abrupt—these are the behaviors that students observe.
When it is worded like this to read about it just sounds rude, however it makes sense for doctors to behave this way to ensure they hold that detached concern. If doctors did not have this detached concern then with every patient they would build a strong bond with, therefore making it harder for them if something bad were to happen to the patient.