The first of these models I shall designate Model Zero. I intend a pejorative sense to this name, since the attitude represented by Model Zero is retrograde and offensive . . . In this model, the word 'professionalism' is a simple surrogate for compliant uniformity. You can definitely be thought unprofessional for questioning authority or contradicting Revealed Truth. Popping popcorn in the microwave is unprofessional in Models Zero companies, presumably because it gives the workplace an unprofessional odor.
Professionalism seems to have to do with almost anything except getting quality work done.
The Model Zero manager is demonstrating a compulsive need for uniformity, something that we encounter from time to time in gardeners. So too the Model Zero manager. One Model Zero company I know declared all facial hair unprofessional. This was in the 1970s, a time when beards and mustaches were largely out of favor. Well, that's not entirely true.