Also the gap hasn’t been so glaring until this expansion. We had someone using Wind/Earth and a hint of water until level 70. So now there is a gap that needs filled. A chance for there to be the foil to the Black Mage casting and focus. White Mage lost those elements, and it’s not like they are just going to never bring up those elements again. You could say white mage gets them when synced so it’s all good, but story wise syncing isn’t canon. It’s just to help new players.

So they aren’t going to bring out new expansions and not have these missing elements. That’s pretty much how all of the calamities started to begin with, overuse or underuse of certain Aether.