I like how you want to defend an arbitrary restriction by mentioning OTHER very stupidly arbitrary restrictions. Do you realize that someone who hasn't reached level 50 with any class yet (new players, people who are levelling a lot of alt classes at the same time) will be locked out of this system for no good reason? This is a vanity system. It doesn't affect gameplay in the slightest. It shouldn't be level locked, the same way dyes shouldn't either.
At least if the requeriment was a level 15 quest then it would be consistent with the already implemented systems. Right now this is just taking the system hostage because lollol.

Whatever, I don't care. This system might as well not exist for me.