I have read George Martins book (Beatles ) and Stings autobiography, both books recommend in reading the “classics “ in literature and poetry. Sting was an English teacher before he made it big , so there must be something in it .
Lyric writing is a massively underestimated skill , Elton needed Bernie .
If the song can tell a good story , that people can relate to , that’s a good lyric .
In pre internet times , ancient African / Aboriginal/ Red Indian history and folklore was passed down from generation to generation in song / music form , so good story telling in music is essential. The Beatles understood this .