If "we all" hated it, they'd stop milking it, because the cow would be dry.
So clearly someone, somewhere is enjoying it - so they keep making them.
And it's safer from a business perspective for Blizzard to release "another WoW expansion" than try to make a new game.
(There is also the aspect that you can sell on nostalgia with the toys, etc, and that you can continue to sell the "old toys" and movies and account them as if they're part of the new, which makes you look better, etc).
So clearly someone, somewhere is enjoying it - so they keep making them.
And it's safer from a business perspective for Blizzard to release "another WoW expansion" than try to make a new game.
(There is also the aspect that you can sell on nostalgia with the toys, etc, and that you can continue to sell the "old toys" and movies and account them as if they're part of the new, which makes you look better, etc).