That was made by I think Valarynn from Twitter? Again the entire page is fairly old and was made when advocating for a high elf AR. That was a modified idle stance to differentiate from Blood Elves, so yknow BE could keep their “visual uniqueness” as some put it.
We since know that Blizzard instead aims to and is content with simply giving high elf options to both Blood Elves and Void Elves instead of creating an entirely separate high elf AR.