No of course its not the point, then it wouldn't agree with your clearly biased view.
Just because the primary enemy is a race does not mean the expansion is about that races faction. WoD had very very little to do with the Horde as a faction. If anything it cheapened old Orc lore with retcons while enriching the Draenei one with a much needed boost.
MoP was not in any way Horde centric either. It went out of its way to show that Garrosh was NOT Horde and gave Alliance and Horde both equal treatment as far as story development is concerned.
WotLK was definitely more Alliance centered with the Horde and Forsaken kinda off to the wayside but still important. The story was at its core the culmination of the old human campaign and cemented the place of the new human king who had been lost for so long. It even brought back Muradin in a rare case of blizzard remembering that the Alliance is more than just humans.
Likewise Cata was clearly horde centered to an extreme, which blizzard even admits. Mostly becuase they finished Horde zones first then rushed the alliance ones and left them unfinished.
Please do not confuse "That race is bad" with "The faction that race is part of is all blizzard cares about"