I never said they can't still innovate, or even that I "think" they still can't innovate. What matters is what they think.
Disney Sea was and is a different "they", and it was built well over a decade ago so is hardly relevant.
Even Cars Land was green lighted a fairly long time ago, and by all accounts was an outlier because it wouldn't have been so great without having a champion in someone who did "get it". But even since then, senior roles have changed and their thinking has evolved/devolved.
All through their history, even just the history of WDW, the TWDC were confident and motivated to do stuff they didn't NEED to, and got rewarded handsomely for it. I dare say it is these things that they didn't NEED to do that are the exact reasons that we all are passionate enough about the place to spend any time at all on a forum like this.
Given their history, why doesn't that happen much today? I still think a significant, though maybe not the biggest, part of it is a lack of confidence (or okay being risk averse). Since I'm speculating, perhaps this could be because theme parks are way out of the comfort zone for the top executives, so they resort to relying on the more straightforward finances that they are more comfortable with. Or put more simply, they aren't Creatives.