I am sure most if not all  top level leaders of organizations have a team of people who help run the company. As with any group of people,  within that cadre of managers a variety of personalities are represented. Those in that group with strong, outspoken personalities can often dominate the decision  making process. Creating an environment where the quieter more humble manager gets an equal opportunity to speak freely protects  the organization from being driven by the more outspoken leader’s biases. The quiet voice might be the one that saves the day.