Blizzard thinks Horde players are the same ones that let their own capital city be the setting of the last major raid of an expansion, where they had to rebel and kill their own Warchief, and Alliance players who do the same raid got a shiny “Conqueror of Orgrimmar” title.
Look at the Ulduar trailer in WotLK. There’s a reason why two characters, Varian and Garrosh, can start in the exact same place, with the exact same degree of bigoted, belligerent racism, but eventually over time Varian’s character evolves into a benevolent hero who truly strives to fight for peace, and Garrosh becomes a warmongering maniac who will use corrupting Old God powers to fuel his atrocities.
Blizzard will always push Horde in the mud while raising the Alliance up to be heroes because you’ve already shown you can take it before and they think you’ll willingly take it again. Yes, of course there has always been complaints about the way Garrosh was handled and the way the civil war conflict didn’t induce much faction pride. But they never saw their sub numbers drop significantly from these complaints, did they?
They would never, ever have the balls to try anything even remotely as controversial with the Alliance story, because they probably believe the Alliance side is where most of the RP and care about plot and story come from, and hitting any of their faction leaders with the villain bat may actually hurt their profits.
Why else would Jaina, one of the people spearheading the war, say she’s not going to attack Zandalar further so they have the chance to mourn the loss of their king? Her personality and motives in the past have shifted to hell and back, to the point where enough people suspected she was a Dreadlord that it became a joke skin in Heroes of the Storm. But, inevitably, she will always be redeemed and learn compassion and goodness once more, because she’s Alliance.
Genn Greymane hated Sylvanas and the Forsaken so much that he was willing to stage a pre-emptive strike against their forces against the direct orders and wishes of his king. His character was one of the only chances to present more civil unrest and inner conflict within the blue faction. But of course in the novel he learns that not all Forsaken are bad after all, and will likely completely share Anduin’s sentiments of just deposing Sylvanas, without destroying the rest of the Horde. Because Alliance.