A road trip later in the picture offers a change of pace, but this is a slice of life of one of many trying to make it on the folk circuit, and the Coens capture every detail, acknowledging their fondness for their era, while being able to laugh at it as well (though without getting as broad as Christopher Guest's "A Mighty Wind," the last major folk movie).
Folk music is beautiful wherever it is sung, even in the kind of homogenized, commercial versions looked down on by Davis (and gently mocked in “A Mighty Wind”).
While there’s humour to be found in the various depictions of folk music in the film, it’s no A Mighty Wind, and the patience afforded to showcasing Isaac’s several, stirring, heart-stopping performances conveys sincerity and respect on the Coens’ part.