How do you know what the guests want? And yeah, the guests (all of whom are individuals who may want a myriad of things, and who include many of us on MiceChat) may know what they want now, but do they know what they're going to want next?
When Walt showed Art Linkletter the site for Disneyland, Linkletter recalled thinking "who's going to come all the way out here to throw balls at a target?" That's what people thought Disneyland was going to be, until Walt showed them otherwise.
The problem with using the current success of Disneyland as proof that all the changes are "what the people want" is that the park is made of components of ages old sitting side by side with eath other, that Disneyland has virtually no competition - not that are truly trying to replicate that particular brand of themed entertainment in Calfornia - and that you don't know if "the people" might not like something else just as well, or better.
I don't particularly care for it somebody posts a nine-paragraph detailed critique of exactly why they think a certain change doesn't work as well as what came before, and it's responded to with "You're just nostalgic." "Disneyland is not a museum." "Disneyland will never be complete as long as there is imagination left in the world." "Keep moving forward." "Disneyland wasn't made for MiceChatters, it was made for real people who don't care about theme parks." Etc. (I guess the other side has phrases like "Disney apologist." So I guess I don't like that either, or any repeated phrase used as a you-can't-argue-with-this trump card. On the other hand, "Disney apologist" doesn't try to twist the meaning of a quote from Walt.)