To get back on topic, RPing as a job is, in most cases, lorebending. That isn't bad in and of itself, but lore is our baseline. When we approach someone, we use the lore to form interaction. It makes people uncomfortable because lorebending is a personal decision: You bend the lore in what way you see fit; there is no way for anyone else to know without having some sort of Lore resume attached to your character. While lore bending is totally warranted when done right, it does technically get in the way of interaction. There's never any way to know whether or not someone is lorebending, why, or how the other person can adapt that into his own IC structure. One person can be a WHM just because they have a job crystal. Another person doesn't recognize job crystals at all in Lore, and their story was that they were taught White Magic. Etc etc. Essentially, it makes things a bit messy, and people are often VERY uncomfortable with that.
