We're talking about the themes of the lands and how they contribute to a cohesive overarching theme for the park as a whole
I don't see that at all.
It's clear Fantasyland in its choice of attractions and IP had absolutely no thought given to Americana culture. It's almost totally a rip-off of European culture. And just because Disney sanitized the stories doesn't make it Americana.
There's a difference between a mid-century American making a theme park from his cultural perspective and making a theme park that intentional uses the theme of mid-century America. Because if you use that metric, then Epic Universal has a theme: Early 21st Century Americana.