This is an untruth. The WOW TBC Gold original Blizzard developers admitted that not correcting the imbalance in racials had been a mistake. Every Man For Himself, a Horde player, proved this. The only people who do not really care about racial differences are those who play casually on servers that offer pve.
It's hard to believe because it's not possible for servers that pvp have a significant balance in favor of the horde across all regions. Blood elves are 1. "pretty" 2. horde, where you don't need to fight against racials. They have better racials to PVP than Draenei or their Alliance cheap Burning Crusade Classic Gold counterpart. They'll be played by people of the Ofc. Their objective was to tilt population towards horde by design and they were the sole reason that paladins received a significant buff in the beginning of vanilla TBC, while shamans were removed.