Only speculating, but I suggest it may have even nothing to do with some specific industry (although paper seems to have a prominent role ...) - rather, an inte

Only speculating, but I suggest it may have even nothing to do with some specific industry (although paper seems to have a prominent role ...) - rather, an interest in artisanal quality. Consider that 'Sushi Chef' is not just some arbitrary post, like 'cook' - it's a status. An artisanal occupation. Not a very high status, but a status nonetheless. The chef can take immense pride in his tiny are of influence, his work is an extension of him. The clients praise (or distain) is 'personal'. So there's an expectation of quality, as a matter of dignity? I'm only speculating.