If you go by game scale, the whole orcish Horde fitted into three ships, Bilgewater Goblins into one and Pandaren into a baloon.
The main issue of High Elves are not the low numbers, is how they're presented and described. High Elves share no leadership, no unity, no cultural traits that don't belong to Blood Elves as well nor reasons to find a wide common ground in the first place. Couple that with their dwindling numbers and rather than a "race" you get a bunch of exiles spread around the world.My point being, is that High Elves are 1/10 of the remaining population (Blood Elves are 9/10s) of those who survived Arthas in Quel'Thalas. This does not count the High Elves in Dalaran or the ones who were in Theramore. Even if they were smaller than those factions (they aren't -- see; Silver Covenant wields an army), what we are arguing over is semantics. There is more than enough of them to be playable.
#1 Unless the post is outright debunked, it's still valid.
#2 The lore changing means nothing if the changes didn't touch High Elves in the slightest. Literally nothing about them changed apart their already low numbers diminishing even further and the Silver Covenant alone getting the occasional spotlight.
#3 They are extinct as a people. The Silver Covenant is just the military branch of Dalaran. As already said, they lack unity, purpose and common leadership. The "High Elves" as an actual people stopped existing the moment Kael'thas renamed them Blood Elves.
#4 You're not going to prove the existence of any change unless you don't bring actual contradicting information on the table.
#5 Those are all official quotes. Much like the AskDev and all other kind of information deleted by the WoW forum's overhaul, these pages are protected from any sort of unauthorized change.