I often wonder if songwriters know which of their songs are good and which are bad.  Surely not everything songwriters write is their best possible work.  Sometimes they need to write songs to fill an album or support a tour, which will inevitably produce less-than-stellar results.  And of course there's at least a small amount of subjectivity involved, both on the part of the writer and on the part of the listener.  But good songs often have specific qualities that are universally recognized and agreed upon.  Dissonance is generally a bad quality, while a catchy chorus is usually a good one.  So the question is, do songwriters intentionally put out bad music?  My guess is yes. #entertainment