I said it when they began doing it in WoD, and it remains relevant and a source of problems to the game right now:
Making the player character an actual story character and affects things was a terrible decision since the game wasn't built that way from the beginning. #Warcraft
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Like I said, I think WoD started it. You were the canon leader of the faction's expedition on another world. Lore characters started reporting to you. Then it got worse and worse and in Legion you were leading all the [Your Class]'s in the world. And then got even worse.
Really worried about Shadowlands falling into this trap. They had it start out that the Convenents didn't care we were Azeroth's chosen or whatever. But our means of escaping the Maw is because of that.