How many “professions” require specific instruction and how many could be handled by apprenticeships until the candidate reaches “journeyman” status. The law and medicine are two such areas which would streamline the pipeline to get qualified people in place. A test (bar exam, etc) could be administered to insure that standardized education is achieved. But do we need uber expensive schools?
Kim Kardashian is going the apprentice route in California, which allows for that prior to a bar exam. Many licenses such as a private investigator license requires apprentice hours or on-the-job experience (such as police officer).
Oh, but how academia would HOWL if that became the gold standard.