Actually,...I have heard that Disney does deeply "care" about the Rivers of America....but they care about it in a negative way.
The theory goes: Burbank and whatever "sensitivity experts" they have, identified Tom Sawyers Island as being "problematic" by 2024 standards. Even Mark Twain and Ben Franklyn are historically "problematic" at Epcot's "American Adventure" as well. Liberty Square itself has also considered "problematic" too. There are MANY things in America's mid-west "frontier" past and history that Burbank does NOT want to promote any longer. I'm even told that Walt Disney himself is considered "problematic" by some management and creative factions inside Burbank. (Thankfully they are a minority group in HQ.)
Remember the shooting arcade? It was a fun place where you shoot a gun at some range targets. This, or course, is horrifying to sensitivity experts...therefore, stuff like this needs to be canceled because it sends the WRONG message today.
Yet, at the same exact time, Burbank CAN promote Deadpool in their parks to kids,...an EXTREMELY, radically VIOLENT Marvel movie with MASSIVE amounts bloody, GUN-GLORYFYING, shooting, killing, murder and massacre. But, an old fashioned, Bible-belt, American frontier BB gun target range is horrible and sends a terrible message to guests????
Funny how Burbank's "sensitivity experts" stay quiet about THAT Deadpool subject. (I'm not dumping on the movie,..I liked it. I'm just pointing out Burbank's hypocrisy)
It's NOT about building Frontier Cars. It's about canceling or "cleaning" an area of the park that they don't agree with, culturally....and using a cool Cars attraction to make you happy about it. (One that can be built ANYWHERE)