TwoSix
Everyone's literal second-favorite poster
The core problem with the D&D class structure is that quite a few of the classes ARE "jobs in-universe", or are at least often treated as such. Especially the classes with distinct magical tricks, like druid and paladin. Not that they can't, or shouldn't be reskinned, but the concept exists as a valid in-universe descriptor.Yup. Classes aren't actual jobs in-universe. They're packets of mechanics used to build characters that you then flavor as you like.
There's no rogue university that churns out thieves, foppish rakes, swashbucklers, and ninja in equal measures.
But D&D also has several completely non-diegetic classes, like fighter and rogue, where an in-universe declaration of "Hey, you're a rogue, just like all these other rogues!" would be laughable.