You would think that, but you'd be wrong. There are a ton of WoW players still subbed and playing that haven't enjoyed the game in years. It's an addiction more than a hobby.
Source: I played all of WoD, half of Legion, 1/3 of BfA, and 2 months of SL. I didn't really enjoy any of that time. I just didn't want to quit because WoW was a social avenue and addiction.