Will allow that, Sally, but with the somewhat cynical proviso,"folk music" exists only for folklorists--who are not really connected to any of the cultures that they study--so that the distinctions they make, and the labels that they assign, are also unimportant to the cultures they study--

It doesn't matter to a community how the musicians learnt the dance music that is played for their festivals, only that they play it--and it doesn't matter to them where the melodies come from, only that they satisfy the community's tastes--

I do value some of the work that the above named have done but I also hasten to point out that they did not come from any of the traditions that that collected from, and to a great degree, they picked and chose based on their own needs, tastes, and agendas--In a way, they bagged, stuffed, and mounted their material, then carried it back to academia where they presented it for their own purposes--