when words change their meaning

In its original sense, a profession is an occupational grouping that has sole authority to recruit, train, and supervise its own members. Historically, only medicine, law and the academic disciplines have fit this description. Certainly flight attendants do not yet fit it. Like workers in many other occupations, they call themselves “professional” because they have mastered a body of knowledge and want respect for that. Companies also use “professional” to refer to this knowledge, but they refer to something else as well. For them a “professional” flight attendant is one who has completely accepted the rules of standardization.

~ Arlie Russell Hochschild in The Managed Heart: Commercialization of Human Feeling

Being professional once suggested integrity. True professionals governed themselves, establishing and holding themselves accountable to the standards of their field. Now being professional mostly means conforming to a set of outward behavioral standards. It has everything to do with the exterior and nothing to do with the interior.