Focusing on character immersion by binding them to the in-game narrative is challenging at best and soul-crushing at worst.
We are being presented a schizophrenic storytelling with an erratic narrative that changes for each patch, as that is Blizzard’s way of pitching players with:
Look over here, we are still interesting! Here’s new stuff and see that drama over there!
Nothing is supposed to make sense nor be a continuation of the past.
If your Horde character despises Garrosh’s and/or Sylvanas actions, the game doesn’t offer any choice on the matters. Either you tag along for the sake of quest rewards and unlocking future content, or you skip the content altogether. You wont add that campaign to your character’s story as they never would have gone that route when given the choice to begin with.
Your character’s tale is the story about what your characters are doing in-between the expansions and their forced narratives.
I would like to think that my Alliance characters are hanging out with the Horde Council right now as ambassadors of the Alliance, regardless of how I know that probably would be in violation of the setup of the Dragonflight story,