I have been moved more by pop songs with mediocre lyrics than by some of the finest lyric poetry ever written. But, of course: pop songs have music. The lyrics of songs have to work less hard to move us, because they stand on the shoulders of the music. Like, durr.
Except, except: the music works its affective magic in simple, broad-stroke ways; where a perfectly judged lyric by Yeats or Keats or the Beats can achieve finer, more specific, more spine-chilly effects. Indeed, I wonder if pop lyrics that are over complicated can undermine their own impact? Is 'Almost Blue' a more effecting song than 'Shipbuilding', and is it so because it's simpler?