they are indeed a different, at least a subrace thats why they are an "allied race", they are changed by the void, they are no longer HE, they are a completely separated group with totally different thematic and visual all together, thats why they can go to the other faction, and thats why it don't refute my statement at all.
Because Their race is already playable, they are entirely identical psychically and thematically to the horde onesIn that case, why can't a group of high elves loyal to the Alliance be playable?