Why should jobs have unique glamours? Can you answer that question without effectively just saying "because they should", in a way that isn't contradicted by gear already present in the game?

I mean, my character in the main story has been referred to as both Azure Dragoon, a capable white mage, recognized as knowledgeable in black magic, and more. Why would she suddenly forget how to wear an article of clothing because she picked up one weapon or another?

And that's beside the fact that I think glamour (as in all character customization) needs to step away from restricting players and just let folk do what they want. It's no fun only being able to make an outfit out of the same highly limited set of items as every other Scholar or whatever.