Except there was plenty of High Elves at Dalaran. Hell before the Scourging of Quel'thalas even Kael'thas himself was a student there.haha, again with hedcanon, no, they are not
They were High Elves, which further more showed how much ppl wanted High Elves in the Alliance. Yeah they turned into Blood Elves(Or Kael'thas's survivors) but the point still stands.the elves who helped the alliance in war3 are the elves from quel'thalas, who are now blood elves
Kael'thas's Blood Elves got imprisoned yes but the bulk that the player Blood Elves were in Quel'thalas. The ones that followed Kael'thas were considered villainous(See Sunfury elves that we killed a lot in BC)again, not all of then, just the ones who were imprisoned in dalaran, and flee to outland, some of then back, justlike Rommath
The ones that were left and well eventually had to feed on fel and other things, High Elves decided "No" and well Lor'themar exiled them. There's already some High Elves in Outland still around but originally the Silvermoon Blood Elves WERE High Elves at one point.except, the "silvermoon blood elves" are the quel'thalas elves, also, high elves, so yes they were represented in the past
The ones that went with the Son's of Lothar and Alleria that ended up stranded when the Dark Portal closed, it's literally right there in BC as I pointed up above.again, prove, cause those could just go back home and be the blood elves now, like Halduron and the other farstriders
Logistics is literally the last thing Warcraft lore deals with, considering Void Elves are here and well Lightforged Draenei are small in number.an even small force who still is in outland