Quote often, such subjective standards exist to erect a barrier to entry for people outside of a social caste. For example, it was considered "In poor taste" for lawyers and doctors to advertise their services.
Of course, if you can't advertise, you lead to a situation where the lawyers with the best word-of-mouth and the best rolodexes take nearly all the profit from the business, and it's very hard for a newcomer to break into the business.
When I read the word "distasteful" or the phrase "in poor taste" or perhaps the word "unprofessional," I always ask myself, "Who benefits from discouraging this behaviour?"