And when you can offer a paid solution to make it marginally better for some while putting them in front of the plebs who only paid full price to get in (making things actively worse for them) and "up to 50%" will pay it, why would you want to kill that cash cow?
This is one of the huge difference between Disney trying to charge for this crap and what most of the other parks offer.
At other parks, it's an up-sell for impatient people willing to pay where it is expected and in many cases controled so that most will not go for it. (and at Universal, it's a sales pitch to improve occupancy at their onsite hotels)
At Disney, many see it as a necessity to make their vacation still feel like some sort of vacation with the state of the parks, today and Bob's pride in showing how many people use it reflects management's understanding of that.
That's possibly the crappiest part of all of this - they're proud of how they've managed to turn their lack of popular capacity into a profit-engine for people already spending ridiculous amounts on what's supposed to be a vacation.
This isn't a problem for management.
Where else in the world could a company run a leisure property like this and be rewarded for it?