You made an excellent observation there. I, also, was immediately drawn to Figment the first time I saw him back around 1985 (first trip to WDW). Never saw, nor knew, what a "Figment" (purple funny creature) was before I entered that Imagination pavilion. I even bought a stuffed Figment in the gift shop at that time. Hence, your opinion about not needing to know a backstory of an attraction is certainly true, if the attraction is so well presented that it draws in the crowds, and people return again to enjoy it.