I am fully aware that the two groups are different political entities.
I am fully aware that when an Alliance player asks for High Elves that they are asking for Silver Covenant Elves and not High Elves that call themselves Blood Elves.
However, they are both High Elves. There is no argument here. They are exactly the same biologically speaking.
The Horde has a playable version of this race. Because of that, the Alliance cannot have the Silver Covenant as a playable race. The political divide between Blood Elves and the Silver Covenant Elves is not a difference that makes them distinctive enough from one another to allow them to be playable on the Alliance either through introducing the faction wholesale or by allowing Void Elves to look like Silver Covenant elves.
I know you have heard this all before. I am humoring you at this point and maybe it is just a morbid curiosity of mine to see how you’ll twist it, but I know you’ll respond with something that parodies a real argument.