Why is it that some folks approach others in the spirit of "you can do the task until/unless you prove yourself incompetent" ...and yet others take the approach of "you're incompetent until you prove otherwise"?
The first approach gives everyone a fair shake at pushing their boundaries. However, it can also give rise to promoting someone to their level of incompetence - which is not fun for those who follow.
The second approach is a catch-22 situation that rarely resolves well unless heroic measures are demonstrated. I don't know about you but I get tired of doing the 'heroic' thing for each new job.
Someone today remarked that men are given chance #1 and women seen in the context of #2. Is this a gender issue? Or is this yet another example of those - male or female - who are fearful and manage while being afraid things will go wrong while others are willing to take more risks with people and tasks?