JBroadway said: "Not sure I agree with you though. Would you say the same thing for something like Lady Day?"
Not sure that is the best example, since it is framed as a Billie concert, so the songs are built into the show and there is no question what their purpose is. Whereas with Girl, the songs seem to be the inner thoughts/hopes/dreams/resignations of the people singing them?
Of course, Audra made the Billie songs serve that same purpose, but you never had a moment where you wondered whether her character was really singing that song. And, they intentionally pitched the timeline of the show for the year before Dylan was born, to make it clear that no one was or could be singing these?
But yeah, it's never an easy designation.