I guess, though, that once you decide to perform in public, playing to your OWN satisfaction is no longer enough...

You HAVE to satisfy the listener, as well! Whether it's your relatives, or Simon Cowell...

That's one of the problems with arrangers. It can lead those with NO musical ability whatsoever to assume they DO, inflict it on the public, and then we all stand around and wonder WHY arrangers have such a poor rap. They certainly didn't get it for no reason whatsoever!

To be honest, I think the 'arrogance' comes from deciding for YOURSELF that you have 'talent', no matter what other people say...!