Ahhh. I can always trust you to have the worst takes.
Can't even try to explain how ridiculous using the existence of racials -which are a gameplay thing- as prescriptive of what a race should be "in universe" isthe difference here is how DH still maintain their racials traits,meaning they still retain their biological/racial traces, while void elves, nightborne and others don't, therefore other race/specie.
Completely dismisses the actual Alleria example. The point is what is the point if void infusion that would make you a "Void Elf" in the genetic sense is unrelated to the appearance, and whether that matches to when an elf would self denominate as a "Void Elf" or see themselves as just an Elf that uses void is malleable.its like saying a human can become a "orc" in terms of self identity if he start using the elements like a shaman, "void elf" isn't a state of spirit like "nighbotne" is(like you were born at night, can you be a night elf nightborne? no.)
The whole point is that any genetic litmus test for what any type of elf is is moot; the species is "elf", the term "race" at best serves as a descriptor of cultural, biological and sociological elements of a group; it's not even comparable to what we call ethnicity in real life because these elves go from one "race" to another.
The comparison between prosthetics making you another race and being undead -which also doesn't makes you a new race, it's a curse- It's just as baffling.their difference is the mechanical parts, making then no longer "just gnomes", pretty much a parallel of forsaken, that are not "just humans".
The concept of race in WoW makes son sense beyond gameplay classification in most cases, and to try to see it as prescriptive of the lore when it contradicts other already established lore is utterly fraught.
Trying to reconcile "race" in WoW as a merely biological distinction, is dumb. It either accounts for sociocultural identity (like it does for mechagnomes) or it just doesn't make any sense.