It means correcting subluxations and not worrying whether you are making the patient feel better. It means staying with your objective even if you have to turn away or lose a few patients. Being a professional means doing your job regardless of your feelings toward people. It does not matter whether the patient is rich or poor, pleasant or miserable, complaining constantly or symptom free. It does not matter whether you like their personality or not, or whether you feel sympathetic toward their problems.
Every person needs a good nerve supply by having their subluxations corrected.
That is your job. Being a professional means doing your job regardless of anyone's feelings toward you. Everyone wants to be liked, thought well of and held in high esteem. But you do not compromise your philosophy in order to make people like you. A marine drill instructor does not worry that his recruits like him.