Garlean Playable Race (?)

[Theodric]

Part of the lore is they are not able to use magic, so they would have to be locked out of any job that can use magic or manipulate aether at all. Which is why I could never happen.

A common misconception - it's rare for Pureblood Garleans to be able to manipulate aether but not impossible. The player character is, already, the exception to pretty much every established 'rarity' rule within the game's lore.

Though even if the writers wanted to stick strictly to canon, we've seen magitek effectively mimic everything from conjuring familiars to teleportation anyway. It could easily be handwaved in a similar manner to how male viera and raen/xaela were never seen before throughout Eorzea before their inclusion.