Originally Posted by
Fyersing
It's consistently stated, but it isn't really consistently depicted.
If you manually count NPC's, there are almost more High Elf NPC's peppered throughout the gamespace than any other single race (on the Alliance). This, of course, excepting those groups which control enormous swaths of land in any of the continents (i.e. Humans, Dwarves, Night Elves and probably Draenei following WoD). The point being that Blizzard has really kept this discussion/argument alive through their constant need to dangle the carrot.
The first point is absolutely agreeable, whereas the second is going to be a matter of perception (as mentioned above).
It doesn't really matter to the average player if Blizzard releases a statement that says, "there are only 50 High Elves, but there are 500 Void Elves", if what we end up seeing in-game is 500 High Elves (NPC's) and 50 Void Elves (NPC's). The way things are depicted, in-game, don't have to perfectly reflect the narrative reality... but they should probably at least attempt as much, lest they sort of encourage players who aren't intimately familiar with the in-universe circumstances to make inferences which are fundamentally flawed.
Which is exactly why the issue of "playable High Elves" has been so persistent. They decided to keep the group relevant, for reasons known only to them, and because of this your typical player often wonders why they're front-and-center for the Alliance, but unplayable. The fact that their numbers are limited, in-universe, doesn't even enter into the mind of virtually all people who see Silver Covenant NPC's representing the Alliance and think, "wow, I wish we could play these".
EDIT: As was mentioned, the implementation of Void Elves is a sort of concession in this regard. The only issue that I, personally, have with their current iteration is that it's something that pleases neither the group who self-defines as being fanatical about High Elves nor the crowd who identifies as being entirely behind the Blood Elves. A lose-lose, from a narrative perspective.