Probably because you haven't been to WDW. Honestly, truthfully, if you haven't been there and your only experience is DLR which is constrained to 2 parks and had essentially a complete redo of one of the parks in 2007 you're missing a lot of how things unfolded over time with the company.
I'd be fine with that but they will still release details because they generally have to and insiders will still generally give details too. People will eventually find out if something isn't up to snuff.
Space 220 is probably a good example of they probably should have never released concept art and just stuck with written wording because for the most part the written word is fairly close to what they said it would be but the windows, graphics, lighting all are not anywhere near what the concept art was (well some is but is kinda bad what the end result is).
If everyone is entitled no one is
I think this is one where your definition is just more narrow. Because when it comes to theme parks it's not about building xyz attractions it's how it is over time. I'm not sure if you were lurking before you joined in late 2021 but I've seen a lot of talk since I've been here since October 2015 and I know I missed a ton of talk in the years before that. I've been around for the announcement of lands and attractions. How they unfolded and how they were received. And I've still missed a lot I'm sure.
Universal for example largely doesn't hold to nostalgia, take that as a pro and a con honestly but generally they are fine with removing and replacing and adding on. They aren't infallible to errors or delays. I wouldn't be surprised if they decide Simpsons area needs to go and something put in its place although with the new theme park they may not need to. Universal too spent a long time in lull land. Most people agree Universal was not "in the game" until they got the contract for Harry Potter but since then Universal has kept going and going. They don't need to open an attraction every year but we also can see that they are continuing to invest in their parks. They woke up long before Disney and that's a big point people make with Disney, they sat for along time without much going on.
I can see why people are annoyed at the time it's taking for clone attractions, why people are complaining about wear and tear on attractions and why they are making the point about what new stuff there is to see and do. As an example the first part of New Fanstasyland in MK opened in 2012 but wasn't fully complete with 7DMT until 2014. Since 2014 there hasn't been anything new in MK...except for Tron 9 years later. At least to my recollection (someone correct me if I'm wrong).
AK has seen Pandora since 2006 but that's all and Dinoland was left to rot. And I could go on and on.