Elite NPC Damage is Way Off (Plausible Evidence)

And here the streamer fights a 29 non-elite mob outside the dungeon, which hits him for similar damage as the elite mobs inside dungeon (he tests this with and without Demo debuff in dungeon):
https://youtu.be/w0R63ZanCLg?t=4097

Is it a controversial statement to say that elite mobs are supposed to have buffed HP and melee damage?