Professional Rules

It makes me think when professionals do not follow their own guidelines. One of my pool friends is a dentist. Why is he the person that brings Skittles to the pool and offers them to everyone? I work with a doctor who is a marriage counselor. Why is she getting a divorce? My internist tells me that I need to lose weight. How come he can no longer button his shirt without gaps in it? Is this a "Do what I say not what I do mentality?" If it is, maybe what you say is not what is best for me.