The point of suspending judgement during a brainstorming session is not quantity for its own sake. It’s to use quantity as a tool to help overcome our blind spots and override the judgmental, linear left-brain thinking that limits our options. We’re wired to find a solution quickly so that we can move on to the next challenge. The problem is that the first solution will tend to be the least innovative.
Most problem solving is just a repeating loop of the same used up ideas. If we’re going to discover better options, we need to feel safe to take emotional risks and push past the obvious.