Says you.
My hunter has survived for so long. She deserves to be called champion and hero. I like the way it had gone. You start with classic/vanilla zones where you are just some adventurer. Slowly you become hero, than champion. It makes sense for them to actually trust you, and believe in you.
Sure the Kul’tiras have no idea who you are. The Zandalari could care less at the start. But Jaina and Lore’thmar, Tyrande and Baine, even Slylvanas all have seen you help save Azeroth every single time. (Because a bunch of elite powerful beings can’t actually do anything apparently). So they trust it to you. (Nathanos is probably the few that don’t bother, but you know he’s the leader of nothing, so he can shut his mouth).
If you don’t want that, well classic is now open. It only makes sense after every expansion for us to actually be known.
You know what I find unimmersive? Being treated like I am a poen or a grunt. At lv20 or 30, you should be called your class. At lv120, that’s when you should be called champion or hero.