It's time to remove job restrictions on glamour...

[Raven2014]

My guess for while they will never remove it is because if they do that, it removes one of the excuse they can use to recycle the gears in each expack. I bet most of us at one point or another see an armor on a certain class and wish "I want to put it on another class", in fact that's what this thread is about yes? So the Dev can use that as the perfect excuse to recycle gears: "hey, that DRG armor only that you loved and wish to put it on a healer? We just make your dream come true, here is the same armor but healer restricted this time!!"

So no, I doubt there is any complicate reason behind the restriction, but more simple and practical ones for it. They can't reuse the model on another class if they already make it usable on every classes.