Some have noted that airlines and hotels have seasonal pricing, so why not Disney?
The fallacy of this comparison is that those industries have hard limits. There are only so many seats on a plane, so many hotel rooms. Adding aircraft or hotels for a few peak periods is highly inefficient, costs that are passed onto consumers.
WDW is different. Except for a select few days of the year, Disney's theme parks rarely reach capacity. Disney continues to sell admission tickets even when the parks become insufferably overcrowded. Disney does not face the same limits many other industries face. Yet those who recently have visited WDW know that long lines await even during "Value" days. WDW's ride capacity is now woefully inadequate throughout the year. Adding ride capacity makes the experience more pleasurable for all WDW Guests, a vital consideration for a vacation destination. It's time for Disney to seriously invest in WDW.
Furthermore, when consumers pay higher prices in other industries, they typically don't share their purchase. When they pay more to travel, they don't share their airline seat or hotel room.
At WDW, the opposite happens. Nearly all experiences are shared. Higher prices mean larger crowds, longer waits, and more frustration.
It would be one thing if Disney raised peak period ticket prices and simultaneously reduced the maximum number of Guests per day in order to "control crowds". (In part, Disney is presenting this as a crowd control measure.) Instead, Disney effectively has announced that Guests will pay for more for a less pleasurable experience.
This is not supply-and-demand. This is paying more for less.