Question: is humpty dumpty a parable?
Answer: Humpty Dumpty had a great fall. Couldn't put Humpty together again. It's a short, simple, AABB rhyme. ... And to the extent that the Humpty Dumpty story is a parable, “don't sit atop walls” is a much better lesson than “try not to turn into an egg-person.” So that's probably not what's going on here.