Exactly. Lore wise they don't make sense in terms of the lore and the alliance lore as well. Blizzard should have done High Elves simply because they were already in the lore and it would 100% more sense than group of random exiles from Silvermoon.
Doesn't matter if they are same model. They have be well done in terms of customization. I have seen nice better looking Customization on the Nightborne than Void Elves. Atleast then I look like a Nice Nightborne Elf with Cool Star tattoos and nicely good hair than looking like crazed Gollum elf.