A couple things to unpack here:
Disney has sought to reduce crowding, not necessarily attendance. Of course, they are one and the same, but if you refer back to "part one" of the strategy I outlined, you'll see that it involved date-based ticketing, targeted room/package discounts, and special events. Their hope is that they'll have a similar amount of guests annually, just spread out to reduce crowding (which creates a better overall guest experience), but recognize that they will price some folks out since not everyone can attend during the "off-peak season," leading to reduced annual attend.
Disney is
not seeking to reduce crowding. They are seeking to
increase crowding on days that the parks are less crowded.
Think of Disney as a Major League Baseball team. Like an MLB team, Disney has
millions of tickets to sell every year. Like an MLB team, if it were up to the organization, the ball/theme park would be full every day of the year.
Who wants empty seats?
However, a Saturday game is much more popular than a Wednesday game. The team has to try harder to sell Wednesday tickets, while it can charge a premium for Saturday tickets. I recently went to an Atlanta Braves Wednesday night game for $15 and the stadium was packed! But the stadium would not have been if those seats were $50.
The same is true with the location of the seats. Everyone would buy tickets behind the home plate if they cost $25. Instead, a team like the Red Sox will charge $500 for a Saturday box seat against the Yankees (if you can even find one for sale) but will charge $21 for a Tuesday night bleacher seat against the Mets (seats still available). Some are willing to pay $500 for the best seats on the best days, while others are willing to pay only $21. You need both the $500 and $21 seats full, but you want to maximize revenue from every single seat. Same home team. Same ballpark. Same experience. Vastly different prices.
Disney is trying to do the same. You want to experience the rides in the best way possible? Pay up your $15 for Genie+. Pay up your $10 to $25 for Individual Attraction Purchases. You want to be cheap about it? Go wait in the Standby line.
Disney wants to find those who are willing to pay $50 per day per person for a better experience and charge them $50 for that better experience. If demand is high, Disney is going to find out who is willing to pay $75 per day per person for that better experience. If demand is still high, it will be $100.
But at no time is Disney trying to reduce crowding.
Disney wants all 4 theme parks completely full all the time.
And Disney wants each Guest to pay the most they are willing to pay for the level of experience they want.
That's how Disney works. That's how all service businesses work.