Not being something the average Joe can participate in isn't by definition bad. There are lots of things the average Joe cannot participate in (for example, charging others money in exchange for legal advice, or performing surgery) that I assume you are in favor of. In some cases it's not optimal (requiring bar passage and a law degree to be a lawyer is arguably just a method to restrict competition in an area where all of the necessary material is publicly available, plus law school notoriously does not prepare you to be a lawyer), in others it is (the consequences of an improperly trained surgeon, or pilot are disastrous).
