Yes, latch onto that example but not the Mag'har or Dark Iron or Kul Tiran ones.
The point is if RPing is all it took we wouldn't have a system to increase character customization for players.
Like I said one could've easily RPed a Dark Iron Dwarf with that gray skin/red eye on Bronzebeard Dwarves. Since a lot of Kul Tirans look like regular humans then a Stormwindian player could just RPed that too.
And all Orcs are former Mag'har who continue to have the same exact culture as before, so you could just RP you're a Mag'har Orc.
These examples show if this was the case for Blizzard and how they wanted to deal with High Elves, then these choices in-game wouldn't be AR either.
Using the "just RP" argument has no solid basis because if that was the intent the AR system wouldn't exist. This is something you keep trying to avoid acknowledging.