I disagree. Many people lack the vision, or sometimes the same negative experience to understand that something needs changing, of people with the original idea. And people often default to the negative, in my experience.

Brainstorm Uber with a group of people and you'd get challenges that taxis already exist and are fine, that laws stand in your way, and that people wouldn't want to get in a stranger's car.

Or to misquote (I think?) Steve Jobs, if Henry Ford had asked his users what they'd wanted before building the Model T, they'd have asked for a faster horse.