Larkin Poe Perform Black Betty

Is this cultural appropriation? I'm not trying to be a wise-ass, I'm just wondering. We sure hear a lot about cultural appropriation these days, and anyone who is pushing the broad definition should hurry up and realize that they are trying to eliminate about seventy-five percent of the musical expression in the world from legitimacy. Be careful what you wish for. 

I like this version a lot, and I'd argue that these girls have a license to play this song, based upon talent, enthusiasm, and sincerity.