If the melody is telling me this is what the song is about, then I'm sort of forced into confession, autobiography or fantasy. If I don't do that, I've hamstrung the melody.
As much as I encourage communication with my readers, I don't want reviews from them, simply because I don't need to be hamstrung in the middle of working on something.
I think politicians get hamstrung by the nature of politics when the private sector can really do great things.