"...perfectly set up for many, many people to sing in unison." Room for some good harmonies as well.
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"Cure" is an interesting word - in Irish usage it means "clever" or "cunning", maybe related to "acute". (The word for the My Little Pony type "cute" is ""doty".) Does that apply among Irish Americans?
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Folkies can sometimes get horribly smart-arsed and snobbish about the business of what songs are seen as out of bounds. More often than not the list would include most of the songs that would most likely be welcomed and appreciated by ordinary people. And yet the essential ethos of "folk music" is that it is the music of "ordinary people" (even when they don't know it.)