No one has all the answers and pretending that one does will lead to withdrawel and possible resentment from other potential contributors. Not a good idea in a team effort at any time, military situations aside.
Asking for input, evaluating it and forming a decision or action plan are attributes of a good leader.

Good leaders are not the ones with all the right answers, but more the ones with the right questions and the ability to put the answers into an action plan to be implementd as needed.