That is true (I love Cash and listened to a lot of his music), but a lot of cons will just take it at face value, same way they do with Punisher.
Btw, Cash has this “shot my woman down” motif in other songs, like Delia’s Gone, and always they end badly, like with him in jail. Too bad the cons only listen to those and skip pieces like San Quentin or Man in Black.
I think that’s what the other person is saying too.