The commit part is actually very important - once the TEAM makes a DECISION everyone is on board with it and runs with it. You don't half ass it or sabotage it.
But if it does go wrong, the decision maker should have the strength of character to acknowledge "you were right"
These two factors held in tension and taken at face value (rather than virtuous politik doublethink) can lead to good team dynamics on a team full of mature people IMO