Why not have a dim view of them? According to you, the whole batch of them was so dumb that they truly believed the main reason to implement RCID was so Disney could build a fancy apartment complex with some office space and stores and then NEVER ONCE mention it in any of the laws/contracts.
They did:
WHEREAS, it is the intention of the Legislature through
the within enactment to supplement, expand and otherwise
modify the powers, functions and authorities of the Reedy
Creek Drainage District, which shall hereafter be known as the
Reedy Creek Improvement District, so as to enable that district
to undertake the improvements herein provided for, to promote
and create favorable conditions for the development and
practical application of new and advanced concepts, designs and
ideas for a recreation-oriented community and to undertake,
and enable enterprises conducted within the District to under
take, a broad and flexible program of experimentation and development
That mirrors some of the statements that Disney were making to them prior to passing it:
Tatum's rationale for Disney's government charter centered on Epcot as a residential community. "In serving the needs of those residing there, our Experimental Prototype Community of Tomorrow must utilize the technological advances of American industry as they continually develop." They needed "flexibility"-autonomous control-to keep it in "a state of becoming."
How about a much more plausible explanation?
The more plausible explanation is that Disney's lawyers knew that having permannent residents in EPCOT, under Disney's control was most likely unconstitutional, and they purposefully wrote the charter with the idea of referring to EPCOT's residents as temporary visitors, aka tourists.
None, or nearly none of them cared one iota about EPCOT being built.
Prove it. Cite a source where they (I am assuming the lawmakers at the time?) actually said that.