> Jazz musician? Everyone who does it for a living ranges from amazing to genius and being just very good gets you nowhere professionally.

Band leaders and/or singers can be, and quite commonly are, very average, and get regular work. They can be pretty bad and work a lot if they're also very good at marketing themselves. (source: am a jazz musician)

Genuine question: What in your opinion are the differences between a great and an average band leader? I've been making music as hobby for most of my life, and band leading is a topic I think about a lot - but it seems for many musicians I meet is not even on the radar.

Hi. Good question! That could take a book to answer. I meant to just refer to their level of purely musical skill though, thanks for the chance to clarify.