More like getting rewarded for participating in world PvP (and winning). Playing on a PvP realm doesn't mean that you participate in world PvP. Remember timeless isle? Unique mount/pet only obtainable through PvP and the most effective way of farming it was open PvP on the timeless isle (which was amazing btw). Did you complain then? Probably not because the mount was shit (so was the pet). Your argument isn't about game design or creating meaningful incentives. It's all about you wanting nice things without actually participating in the respective content. Because that's what it is: content. World PvP is going to be simply another PvP activity by the looks of it and there's no real difference to instanced PvP except for some balancing aspects. There'll probably be enough zones like Black Rook Hold arena in which you'll find alot of players. There you'll grind a few HKs and then go on your merry way and switch back to PvE after using one of your 6 Hearthstones. There's virtually no difference between this and instanced PvP and you should really stop disguising your feelings as rationality or accuse others of feeling entitled after using that twisted logic of yours. Makes you look a tad ridiculous.
Edit: please excuse my tone. I didn't mean to sound that harsh.