Ok, let's see, most of Johnny Cash's hits were written by other artists or June Carter. Whereas Bruce Springsteen wrote EVERY ONE of his songs. BTW, in many peoples opinions, Bruce's political philosophies aside, Cash couldn't hold a candle to Springsteen.
Brucie can't hold Cash's jockstrap. So Springsteen wrote a lot of crappy songs. Big deal. Thirty years from now, Cash will remain an iconic legend, and Brucie will be in the bargain bin with Bananarama.