Interesting point and one I struggle to support either side. In Europe one needs training of some sort to do most any job, including cab drivers and waiters, which involves class attendance, testing, and fee. Such types of regulations didn't really exist in the US 30 years ago but are creeping in as well.
Their goal is double edged; one one side they aim to add skills and professionalism to a job type, on the other side such degree serves to prevent non holders from performing the job and create defacto segregation.
The question then is, who is ultimately to benefit from that training? I think it's the customer. One may not like the arrogance of a French waiter, but no one can criticize their impeccable skills and professionalism. In the US, half the time I wonder how the hell my waiter got their job in the first place.
This doesn't mean someone with the right attitude can't master the complexity of a waiter's job without having to go to school for it. And for that person it's just not right to impose time, test and cash to reach their humble goal.
I'll sit on the fence on that one.