Not sure I really understand the question.

Traditional songs reflect the entire spectrum of human experience. There are songs showing great care and tenderness towards one's beloved and there are songs about playing the cuckold.

There are also songs about Christ's love and there are songs about the farmer's daughter.

Where you have songs emerging from oral story-telling traditions I would surely expect to hear diverse stories being told.

Not many successful stories have a boy-meets-girl-and-everyone's-just-ducky-about-it theme. That's not drama. That's an NSync album.

If you're asking why is there bad behavior in the world, that's move that to a theology forum.