But if it's always been a problem, then how do you know it can ever be resolved?
Seriously the crowding issues are far more nuanced than just building out more space. Building new attractions is great, but then you are limited to the capacity of those new attractions at a micro level. If your park only holds 60,000 people, but 70,000 want to come in, you have a capacity issue. If only 20,000 of those 60,000 can ride your new attraction, you still have a capacity issue. If the lines for your most popular attractions are all 60+ minutes, but no one is waiting for the Tiki Room, you have a capacity problem. Is the bizarre math of capacity that makes sense of removing attractions for meet-and-greets, closing high capacity people eaters like Carousel of Progress and trying to jam more and more theater shows into the park.
That bizarre math is what NGE was supposed to help resolve. I think it's overall success is probably debatable, but it's a far different premise than finding a way to completely stop investment in the parks.