Agreed.
Proof of this? Well Blizzard has always addressed high elves and blood elves separately.
- Remember back in WotLK when High elves had their own district in Dalaran, their own faction, the silver covenant and their own leader, Vereesa.
- In MoP High elves assisted Jaina in the purge of the blood elves.
- In Legion, Elisande addressed HEs and BEs separately. And High elves had their own army stationed outside Suramar.
- In BFA you can see high elves NPCs helping the Alliance in the warfronts. Opposite to BEs.