Do project managers need to fail to succeed?

In an interesting article at Tech Republic, Paul Glen believes that beginning project managers need to fail before they succeed. Beginning project managers don't have the ability or know-how to manage the tasks, the people and the risk management the first few projects they manage.

Instead, he believes that project managers need a little bumper room the first few times they manage a project:

• A few big mistakes
• Permission to make those mistakes
• Coaching and introspection to learn from them
  

Do you agree? Are the best project managers the ones that are given room to fail in the beginning?