"Because they are not using quality as a guideline . . ."

'Quality' is a matter of taste, and it is subjective. But all the Martin Carthy's in the world would have precious little to draw upon if not for the traditional singers you and others continually disparage and the folklorists who have collected their work. Without them, you might well be singing 'Humpty Dumpty' or 'Hotel California' and be satisfied that you are singing traditional English folk songs.

". . . if you dont understand that you are a bigger berk than I previously thought."

What kind of berk do you think I am, anyway?