Sorry, 'folk art', even back in the stone age, was a commercial transaction. The work of the musician/singer/historian was so important to the clan they'd be enabled to get out of this or that in order to learn and get good at what they were doing. And notice, I did say 'if their work is presented to someone'. Sure, if you write poems for your own satisfaction, you can, but if no one knows about it, well, they don't exist in the wider world.
MG