I agree that It's helpful for us to reduce unnecessary emotional consumption in the service. However, I think that service is made up of people's emotions and is indispensable. To create service, it needs employees and customers interaction and participation. This interaction process always involves emotion. It can not be called  a real service when this core element is lost.  Also, human beings develop for better service because of each other's disagreement. If we block this communication from the beginning, we will not be able to receive better service.