No matter how long you've played World of Warcraft, you can't stop but complain about the Horde vs. Alliance factions. This element of the game has divided friendships and hijacked the story itself but there are some good reasons why Horde vs. Alliance is important to the story and gameplay of World of Warcraft.
Everyone is the same in Warcraft
Blizzard has managed to bring some emotions to the Horde by making them playable and allowing players to go through everything on their perspective. In the World of Warcraft, these monsters are not really monsters at all. For example, Orcs are not inherently bad although they can be very violent. Instead, they are portrayed in this game as very gullible creatures who trusted leaders that betrayed and abused them.
No one can be a winner
In the World of Warcraft setting, no one will really emerge as a winner just because of the fact that when someone wins, everybody loses. This faction and war is what makes the game tick and removing this element will leave players with nothing to do resulting in boredom and them leaving the game for good. Moreover, the narrative recognizes that no one really is wrong or right but all are just products of the circumstances that are at play around them.
Everyone has a reason to fight
The beauty if the World of Warcraft narrative comes from recognizing that every reason is valid. For examples, humans resent the Orcs for suddenly coming into their world and started killing and plundering. The Orcs, on the other hand, sees humans treating them worse than slaves, which is true as well. Other characters have their own reasons as well. The Forsaken can feel resentment towards humans who sneered at her fate. A Night Elf might feel angry toward an Orc for bombing forests which she considers as her home.
