It is the same incumbency kind of system the ancient guilds became. The original stated purpose is to provide a standard of qualified education or training (apprenticeship) in a trade, bug nearly as fast as the requirements of the guilds become the law, it becomes the incumbency protection racket that makes it all “by law” allows it to be. Were it just a standard someone can agree to in their practice, but not a legal requirement, customers could judge for themselves if they are getting better service, or not, by those claiming to meet that standard. Over time, the standard would achieve a majority of customers, if it was worthy of it.
Too many illegal aliens around here selling food on the streets and setting up restaurants and hiring illegals with diseases.
I'd die before I knew where it was safe to eat.
“It is the same incumbency kind of system the ancient guilds became.”
Occasionally there were religious zealots that worked on building the cathedrals of old for free!
The guild members would take them for a long one-way walk in the nearby woods.