If I'm saying he's not atleast very talented I'm wrong?
I guess I'm wrong then, becasue he is not.
Bono, The Boss, McCartney, Lennon, Prince, Eddie Vedder, Ben Harper, and even though I'm not a fan, Noel Gallagher fall in the catagory of 'very talented' song writers because over a 15-20 year period these guys have consistantly banged out great songs and have released many great albums, and even not so/as great albums which have sold millions of copies.
Those who have had what most consider one good album, lived of the hype for a bit then bugger off fall into the aptly put catagory of 'Lucky chancer who writes a decent song every so often.'
And I hasten to add being a great poetry writer does not in any way mean you are a good song writer.
Music is an extremely large factor when deciphering great song writers.