Originally Posted by
Teakwood
Basically, assuming that jobs have to evolve naturally out of their classes lorewise assumes that the "protect everyone and save Eorzea" job, Paladin, evolves naturally from "A PIRATE DOES WHAT A PIRATE WANTS, YARRR" and "paid to fight bloody duels to the death in a sandy pit for the entertainment of rich, amoral Lalafell".
It's more like "you already have a particular skill set, this makes you a prime candidate to learn something else in-character that builds off of that skill set but isn't particularly related to that skill set's story".