This is going to blow your mind. While it was called "Future World", the area of EPCOT Center was themed to Education and History. The "future" portion of every pavilion was typically a small portion at the conclusion of the featured attraction (that was concerned primarily with the history of a particular topic). It was designed that way for just the reason you present in the portion I quoted above.
The "future" portion was small and intended to be constantly updated to stay current. The historical portion was grand and expensive and designed to stay the same with minimal maintenance (because "history" doesn't change).
Management FUBARed Future World by ignoring the "future" portions and spending cash on, altering and in some instances, demolishing the long-term historical components. Recent management are idiots. The original designers? Not so much. There was a lot of foresight utilized.