It's interesting that this question produces so much animosity as if to say that
if you sing a folk song, you have to defend your position as to this discussion.

I would like to hear an honest opinion of what a folk song is rather than a travel down a rabbit hole of "clever" discourse.

I assume that people on this thread have had an intimate acquaintance with what we call "folk song" and would like to hear an intelligent analysis based on your experience.

I think the question is legitimate particularly if you want to share the beauty of this
expression with those less familiar with it.