
Sounsy (as usual) has the right of it; The OP asked for clarification as to why a thing is a thing, not how the thing is a thing. All of the arguing ensued from a tangent regarding if it was okay to be super special someone who deviates from the currently-accepted lore.
As a tangent to that, I use the term "currently-accepted" to refer to the general understanding or agreement amongst the various circles, cliques and communities that make up the greater RPC community. To reiterate something, again, though: White Mage is a title given to those acknowledged by the Elementals and the Padjal as protectors of the Shroud and the pure of heart. If you aren't interested in playing that specific role, you shouldn't worry about becoming a White Mage. Similar to a capital-P Paladin, it denotes a title and a role, not a skillset.
As a tangent to that, I use the term "currently-accepted" to refer to the general understanding or agreement amongst the various circles, cliques and communities that make up the greater RPC community. To reiterate something, again, though: White Mage is a title given to those acknowledged by the Elementals and the Padjal as protectors of the Shroud and the pure of heart. If you aren't interested in playing that specific role, you shouldn't worry about becoming a White Mage. Similar to a capital-P Paladin, it denotes a title and a role, not a skillset.