I think Unity is useless because these kind of inexperienced users almost don't exist anymore. Everybody got used to the "ugly" interface made of contextual menu and "hard" to adjust settings and those who didn't could live with sensible defaults that could always be overridden.

But with Unity it's like if they went out there to replace QWERTY keyboards with friendlier layouts without paying attention that none of the current users already got so used to the on-purpose-unfriendly layout you're actually slowing them down now.