Oh, we've been saying the 'short-term, shareholder value only' business model is unsustainable since twenty years now. ('Begone, evil Eisner...'). Yet here we are.
Truth is, economics and spending has shifted towards experiences. A day at Disney is now more expensive than a colour tv or PC, which would've been an exceedingly strange observation in 1992. Never mind concert tickets ans the like. $5000 Bruce Springsteen tickets, anyone?
Tourism has exploded the past decade. WDW could ride that wave, regardless of any intrinsic value to its offerings. The Mona Lisa and Venice too were infinitely more enjoyable in 2008, without a 45 minute line and the experienced ruined by incessant selfie-takers for the former and permanent shoulder to shoulder crowds for the latter. (And Prague, and Amsterdam, and every great natural wonder on the planet). Speaking of, several European cities have recently resorted to charging entrance fees, simply to diminish exorbitant demand. Disney Parks to a large extent function similarly. There will be no end to the high demand nor high prices.