What makes these threads more memetic is both the extreme effort put into the posts by the two OPs and the fact that it's a very narrow field. People shitting on Baine, Anduin, Sylvanas, Saurfang, etc. are all universal topics about characters who have a huge impact on the present story. Arcane night elves are a niche of a niche
and a mistake besides.
To answer you and @
Mace by extension, you are right that the night elves do have a lot more history and elements to them that often get ignored in favor of tree-hugging and being victims. That having been said, the arcane is an element they should not have. Wolfheart was a mistake and so were the Shen'dralar. A race is defined as much by what it can't and doesn't do as by what it does do and the night elves' gender roles, militancy, relationship with nature and rejection of arcane and 'civilization' are all key there.
Vanilla did away with the gender roles, their nocturnal nature (we like being around by day because the humans are
), their militancy, by making them militarily weak peaceniks and their relationship with nature with all their ancients and allies ditching them. All that was left was the foundational breach of their society, between those who rejected the arcane as being the way to organize the land around them and the society they built and those that accepted it.
They had the entire world broken due to decadence and arcane use, the stigma made sense and so too did it make sense that the high elves would bail and make
their own society on the lines of the previous empire. Hence, you had a dichotomy wherein both races represented aspects of the original empire and were also opposed thematically, having elements and focuses that the other doesn't. If you allow arcane into the night elves, then the high elves become perfunctory and the conflict between the races becomes inane, as does the original gap between the peoples. Both races suffer - the night elves by absorbing more aspects that dilute their central focus in favor of being a cosmopolitan entity capable of all things and the high elves by showing that the reason they left could be easily solved when an incident much less damaging to the kaldorei than the Legion Invasion, be it the first or second happened. Less is sometimes more.
@
Mace and @
ravenmoon both draw the distinction between night elf arcane use and high elf/old highborne arcane use as being excess. This is not a sufficient line to differentiate the two. What is excessive and what isn't? And if arcane is accepted either way, what separates high elves from night elves? Skin colour and aesthetic, at best. This is unsurprising, because the same posters also support a union of all elves.