The bit I struggled with is that in many fields, either the majority are wrong/don't have the solution (Argumentum ad populum) or otherwise listening to expertise/experience can either give you too much input or, again, implies that there is more chance that experience will give you a better solution to a problem. In their example, if Dr. Ignaz Semmelweis had asked his more experienced peers about approaching the problem of infections, they would have told him he was barking up the wrong tree with hand washing.
The really difficult part of any venture is knowing how to distinguish wise advice from just another opinion.
Many great solutions come from people with "crazy" thinking and I would expect they could have caused great damage (or perhaps have - jet engines) but otherwise we would be moving very slowly as a planet?