I’m not sure what is meant by professionalism. I suppose it has something to do with knowing what you are supposed to know on the job. Nobody wants an amateur hair cut. But then, some professional athletes behave very unprofessionally and seem to have little concern for excellence or the level of their performances. Some professionals provide tangible services others need, and they have the tools (intellectual and materiel) to get the job done. Of course, they have skills which a relatively few possess.