If a songwriter is like Woody Guthrie and wants to use folk music to change the world, then he or she would probably have enough to say to make it worthwhile to write three songs a week, perhaps. But if a songwriter doesn't have Woody Guthrie's passion for social justice, it probably would be difficult for that person to avoid overwriting or writing too many songs that sound alike in tune. What I think was good about Woody Guthrie's personal life, besides his artistic creativity, was that (unlike most U.S. professional musicians) he was unwilling to sell out to the U.S. or UK corporate music industry in order to become a millionaire entertainer. His treatment of women in his personal life, though, was apparently considered exploitative by some people. If you believe that it's more important for a U.S. left-wing artist to be a good human being than a great artist and that "the personal is political" then you probably should not elevate Woody Guthrie into an icon or saint, although he was, admittedly, the greatest U.S. songwriter of the 20th century.