One of the things that schools try to push on people is the idea that there is no dumb question and also the idea that all opinions are of equal weight. This kind of thinking is complete an utter Fantasyland.
There are great many dumb questions and generally they come from people who've been taught that they can simply ask a question instead of doing any kind of investigation on their own to acquire knowledge or experience and then using the question to fill in the gaps. Additionally there's a lot of bad opinions that are made because of failure to understand the environment which something is in. Some fresh students that enters the workforce has tons of foolish questions and a lot of opinions born of ignorance and I think the workforce is squashing their creativity. Is very much like when you have children and they turn into teenagers and suddenly believe that they know more than the parents. This idea of your old therefore you don't understand is the height of ignorance that they display.
More students need to be taught that they need to listen to the wisdom around them, before they begin to implement "creativity". This may be something that takes years before they are ready to properly participate with creative solutions depending on how fast they can actually pick up in a stimulate information.