I like David's thinking. That would be sort of like painting in Black and White. Still, I suspect Joni would remember if asked - and I would be interested in her answer.
David wrote: "Because I hear her as a bold experimentative creator, I don't find it impossible to believe that she simply didn't hear anything but the melody in her mind. She's tried a lot of other surprising inspirations; why not a melody without chordal accompaniment?"
