Sign
Blademaster

Blood Elves are basically High Elves. Slightly different eye color and backstory, but if you want to be a light skinned elf, that is basically a Blood Elf. Giving that to the Alliance would blur the line between factions.
There aren't a ton of High Elves out there in WoW.
If you are Alliance and want to be an elf, the Horde is there for you.
-Ion Hazzikostas: Game Director for World of Warcraft