There doesn't need to be a story - Imagineers themselves taught me that. There is no story to riding Dumbo. It exists as a flight of fancy.
Theme is not story - theme is controlling idea.
The original idea of the Sunshine "Season" Food Fair was the bountiful harvest, a single season.
Sunshine "Seasons" is based on the idea that there is much to be offered from the land, reguardless of season. The food reflects the various seasons, and the design of the area represents them as well in the seating modules and balloons overhead.
The interior of the Land is a move away from place-replica theming, as was done with the Food Fair, to a modernized ideology where the idea itself is supposed to speak versus the surroundings.
Painter used to think pictures only had meaning if they depicted something realisticly. Later, we've learned the connotative values of color and trhe ability of the mind to be freed from the used of a graphic norms.
If you can't accept it, well tough shiza - atleast appreciate the millions of stylized gobos that project appropriately themed patterns onto the table tops.