"It's important that folk performers remember their role is to entertain an audience, not preach at it. What I've found appealing about this music all my life is that it covers all aspects of how we, as people, live. Not just romance, or light subjects, but everything."

Everything includes preaching. And a lot of other things. Music is to help you get through life, hard times as well as good. That involves a whole lot over and above entertainment. If there's a serious subtext to this film, and I think there probably is, that's a key element in it.