The you're a hero thing only makes sense if you played that character from vanilla. If I make a character now they never defeated nefarian, they never defeated kael'thas and illidan, they never defeated the Lich King, Deathwing or Garrosh. They're just a nob that stumbled their way through a confusing timeline.
I really despise this sudden "chosen one" thing, because it makes no sense in the actual game. None at all. I also don't like my lil character to be stronger than Thrall, or any other established hero. It feels weird and wrong. It goes against the way we've learned to play WoW, the way we've been encouraged to shape the world around our character. Suddenly we're a superhero in world filled with thousands of other superheroes. If they had done it from the beginning, like FFXIV or SWOTR did then that would have been a different matter entierly.
But they didn't. So my rookie Blood Knight bloodelf will now suddenly run around with freaking Ashrbringer and be the leader of Argent Dawn. It makes zero sense. Especially since all the other paladins will also run around with Ashrbringer and be the leader of Argent Dawn.