The taboo is enforced, you see.

I have no doubt that beside every great Monarch, there is a dedicated Meister who holds great knowledge of Attributes. Those who know the secrets of a great many Classes. These rare individuals are valued for the power they hold, but they are also feared. For, what if another were to learn their secrets? If a person, unsanctioned and unbound, by oath, or blood, were to share this sacred knowledge: the balance of power could be undone in the passing of a single generation.