If you screwed up, well, that helps me to look better. But if we say we're all responsible for the whole, I'm not going to let you screw up. And a third is that a powered-up organization is a learning organization. Managers tend to be great individual problem solvers but lousy group problem solvers. Let's say we go into a meeting and we have a problem.
Most managers show up with a solution.
So we start arm wrestling over which decision is best. We may compromise and put something together, but that's different from real problem solving. Problem solving works only if I don't have the answer. In a learning organization, I can admit ignorance. There are still times when the traditional is appropriate, when the leader should be the one to provide most of the answers.