Seems to me to be coming from the point of view of producing a sound rather than interpreting a song.
The English/British tradition is basically a solo voiced one - a few ritual and work songs, otherwise, narrative based.
One of the problems raised at the heyday of the Watersons and their coyists arose when the harmony style was applied to all songs, no matter what their content - they all sounded basically the same, which is the fate of all songs that lack interpretation.
Jim Carroll