Way to miss the point.
The point is that, despite all your claims about "blood elves are high elves", we have an in-game example that points out, black on white,
high elves and
blood elves as
separate groups. That "high elves" are, indeed, a
separate group from blood elves.
And as for your "the Silver Covenant isn't Alliance because it's not involved in this war", it doesn't mean much. They
are Alliance because that's how they've aligned themselves
every time they have been brought to the forefront. They've also always been shown as hostile toward the Horde. To say they're 'neutral' is like saying the Alliance is neutral toward the Horde because they don't attack each other in a 'sanctuary' zone like Dalaran or the Argent Tournament.
I've shown you examples of Vereesa showing clear contempt toward the Horde, which shows
where her allegiances lie. Possible reasons they're not helping the Alliance have been detailed to you by @
Aucald in prior posts.