William Blake wrote somewhere ""The fool who persists in his folly will beciome wise."

Chesterton said "If a thing is worth doing it is worth doing badly."

And I reckon that, when it comes to small group music, like Irish or Old Timey/Bluegrass, a bunch of people playing together who aren't all that great separately can often make music just as good, or even better than a bunch of virtuosi. Well, I would say that - but I still think it's true.