American Prayer was experimental though. I love it but it didnt cross my mind as I was more consciously focusing on the song like songs. But I get your point and will not get astray from the idea.
Any more of details on the point a) music can be written for lyrics? I mean How? Like as you mentioned 'An American Prayer', it almost puts a light bulb on my head. If my poetries cant be sung, how about recitations, I mean. But American Prayer werent as flat as recitation, there was an element of musical sing-songness to them. How do I figure that out?