Consider the different styles and results from these two kinds of musicians.
The one man band is a kind of novelty act. They think they are good at everything so they do everything. They think they don’t need anyone else to get things done. They are busy, really busy, but are they effective? Is this kind of performance sustainable?
By contrast, the conductor of an orchestra doesn’t seem to be doing much. How hard can waving a stick be? In reality, much of the conductor’s work has been done before the concert. The right people have been selected due to their skill set. They have been grouped according to where they do their best work (eg brass, woodwind, percussion etc). They are all working towards the same aim (playing from the same song sheet) and they are performing to a high level (they have practised and rehearsed and sound great).
If you have ever seen a symphony orchestra in full flight you have probably not believed what you have seen and heard. So many musos, such coordination, resulting in such a magical sound.
As a leader, are you flogging away on the footpath like a busker, or basking in your standing ovation when it all comes together?