There are lots of last verses, concluding the story, but this added one of yours sounds like it comes through the filter of a singer who felt the need to draw conclusions. Putting a "moral" on the end of the song may be representative of a certain period in time when morals to stories or songs were popular, so this was added on. You know, a trend, akin to the types of messages you find on historic gravestones or the tendency for novels of a period to all have happy endings or sad endings, depending on the popular or religious sentiment.

SRS