If that were true, Figment wouldn't be plastered over as much Epcot merchandise as he is.
I do think it's a really good idea - apparently there is going to be an Oswald series on Disney+, so a Figment one could work; I think the attractions and character of the parks are far more suited to a medium like Disney+ than they are to cinematic franchises in general. But I don't accept this notion that people don't care about Figment or are unaware of his existence. It seems an easy get-out now for anyone who wants to downplay or dismiss the notion of repairing the damage that Disney has done to Imagination, but there is really no basis for it - people know who Figment is, Disney just like to pretend otherwise when it suits them.