Most success is a combination of skill and luck. Unfortunately, many people conflate past success with the ability to reproduce it. But, even if you make the same decisions in similar situations in the future, it's far from guaranteed that things will work out the same way.
People in positions of authority need to actively remind themselves that no one can predict the future. Wise leaders are certain and open. In other words, after actively seeking dissenting views, they make decisive choices.
In addition to soliciting opinions on the details of the process, leaders should include all participants in defining what success looks like. If they don't, they risk deluding themselves into think they're open to dissent, when in reality they're only open to specific forms of dissent. Be consistent and get consensus on what success means for your team.