Its not just high elves though.
we get the same topic with other sudo popular fan demands such as naga, tinker class tails for worgens and many others.
And its the same story everytime, the same reasons are brought up on both sides, no one really comes with a compelling reasons to actually convince people and the topic dies down again until the next time a hint of a chance emerge.
So far this thread alone is mainly just repeating that high elves are alliance loyal and should be playable for that reason alone, and people repeating that they are playable but they are called blood elves now.
I don’t see a compelling reason to back the high elf request, because from my perspective its asking for a nothing burger which ultimately will satisfy no one but a vocal minority who behaves fanatically.
Would I personally like high elves to have been alliance and ogres to be horde as was the original plan in TBC? yeah, that be swell.
But we have void elves now, arguably a downgrade but they added the skin tones and eye color etc.
They can look as much like a high elf or blood elf as you want, yet still its not enough for some because sometimes they turn purple in combat, which is apperently such a massive distraction when they play pve or pvp that the void elves are simpley insufficent to these people.
I barely notice my void elf turning purple in dungeons and raids, because my eyes are not on them and I mainly rp in this game which rarely involves any direct combat with pve or pvp that could trigger the form, so for all intents and purposes I already have my high elves.
I don’t grasp what net positive adding high elves, exactly as they are, name and all, gives to the game, I dont think its going to solve sub numbers and arguably it might do more harm to the faction balance by tipping it even further towards alliance. A majoity of players want to play eye candy and alliance have more eye candy than the horde, so people flok there to play their eye candy character with their friends or guild who is also playing their eye candy characters.
Resolving the faction divide with shared guilds and groups is going a long way to fix this, and perhaps some day in the future you can roll a blood elf and enter stormwind unharmed because the old faction dividing systems are gone.
But that day isn’t today.