So let's compare an alliance player vs a horde player, an alliance can literally every single week fuck the horde capital, and fuck their warchief, a horde can't, only option - if u want to count that - is attack theramore in a scenario that sucked for some achievements (can't be compared with mini pets/armor/mount from raid), and as ex-alliance only reason i remember Theramore is portal to Onyxia and Tailoring master trainer, it is nowhere an important city as even Stonard - the equal portal - which had 2 training masters of alchemy and can't remember other profession, and also give access to horde players (with fly) to Karagath post (didn't play horde in vanilla so may butched some names) for multiple raids and end-game dungeons
Those 'events' we see now are at best 1 time event (does anyone remember the 1st scourge invasion in patch 1.12?), if anything game shown after 14+ years, the thing that stay most is raids, ppl will do raids forever for transmog and mini pets and mounts, even achievement hunting isn't as important as other specs, and the only alliance leader we can kill in a dungeon i can name is Moira (can u still do that in BRD?), and even so - quests wise - u shouldn't kill her in first place
Does blizz involve horde a lot more than alliance in story ? no question, alliance is generic boring, old joke but we always described ourselves (I was alliance as i said) as humans, tall humans (nelfs), short humans (dwarfs), tiny humans (me, gnome in-game)
But is that focus good ? NO, blizz fucked horde way too much, from honorable noble warriors to whatever disgusting shape it is now, from best friends to colleagues at best, from time where trolls were talking orcish to show strong relations to now where it is obvious that each horde race doesn't really mind if the other race get wiped, from trolls who got looked down in Garrosh era, to Taurens who are alliance but not, to Orcs who fucked way too hard, to belfs who has the worst Stockholm syndrome and wanted to return to the faction that tried to wipe them out, to Forsaken who were never trusted in first place, that 'focus' on horde is focus on how bad horde is, or in blizz words "morally grey", blizz shit on their own lore in every expansion and change anything on wimp to fit whatever they want to sell, something that effect both sides but since focus is more on horde so they fucking horde way more than alliance, Greymane who attacked horde on sight in legion is willing to stand back and help nelfs first, a 'positive' change that makes no sense from someone who literally disobeyed orders and attacked in time that both alliance and horde were getting to near best buddies lvl saving each others everywhere (for example entire rogue campaign, saving exodar, etc)
- - - Updated - - -
the 'retcons' that blizz introduced in wc3 only to shit upon it later...
so horde were 'villains', only to learn later they were even worse victims than alliance, only for later to they were 'villains but not really' in AU crap, to whatever they want to sell
blizz change anything just for $$$