That’s pretty much my main argument. I’d say that if Blizz really wants to open the floodgates and do so without making the cultures of the races feel less impactful, this is their golden ticket.
It takes like 2 sentences to justify, and you then don’t have to pay basically any more attention to it.
Additionally, from what I’ve seen/heard, that seems like what their doing (could be wrong though). I haven’t checked it out, but I saw another thread where people were discussing a new quest that involves members of these new races checking out some warlock/demon festival(?) to learn more about becoming one or something along those lines.