As a business you in fact have an incentive to target these kinds of identity-driven consumers as they are much more likely to spend more on average than others.
And Disney is shifting their entire GTM as a result, but frankly there is nothing wrong with that - consumer tastes change.
That said, it sounds like you are dismissive of Disney-fanatics when in reality everyone is hypertargeted by their specific subculture. Doesn't matter if your a Tater, a ranked MMO gamer, Boardgame addicts, fantasy football aficionado, CrossFit enthusiast, mechanical keyboard collector, etc.