???
Lore book doesn't state anything about devs being the reason the WoL cannot wear Paladin armor on their Black Mage?
Also, let me state: the argument that your character can wear a bikini as a tank, but not a mortarboard as a tank, is irrelevant. That gear is not locked due to the ability of being able to wear it on any class, DoW, DoM, DoL, DoH and all the ones inbetween.