I think you'd be surprised how many people actually just enjoy the shitastic floaty hotkey combat of MMOs like WoW. For many it's also just the option to play with others, you can't just load up Geralt and then play together with your friends. I mean WoW has become popular because you could actually do stuff on your own in the first place, let's not forget that. WoW is the babies' first mmo as far as the MMO scene is/was concerned back in the day. So it's hardly surprising that people want to have more of that.