Probably because no one under 50 even remembers what WDW's Rivers Of America complex looked and operated like.
They permanently closed their Canoe ride 40 years ago. They permanently closed their Keelboat ride 35 years ago. They lost their second Riverboat 30 years ago, and never replaced it. When did the restaurant on TSI permanently close, around 25 years ago?
TDO killed off their ROA complex, and all the ride capacity it had and all the showmanship that capacity offered, decades ago. The only people living east of the Rockies that remember it are members of AARP now. So who's gonna complain?