I think this is interesting, and I can see the point the person is trying to make. However, the therapeutic relationship is a little different than seeing your doctor or dentist. A lot of people see their therapist once a week on a regular basis. You don't have as much contact with a doctor dentist. Plus, some dentists and doctors hug their clients. I have seen my doctor hug clients. She hugs my mom. I think boundaries are important in any relationship, but to compare it to a relationship one has with their doctor or dentist seems very cold.