So no, it is not a tautology or even an obviosity.

Absolutely. BUT if it wasn't for floor singers I doubt I'd hear any Folk Songs that weren't sung by long-dead traditional singers on the various field-recorded archives. Floor Singers are more than the backbone of folk, they are the heart & soul of thing - the whole point & purpose of what still remains a great night out no matter where I might fetch up, thus restoring my faith in life, the universe & everything...