Once upon a Time: Um morbid much?

The narrator's short story seemed morbid to me from the beginning. Very morbid. The whole idea of not helping others seemed a strange idea to promote in a children's' story. And of course the son getting injured in the security fence, very possibly leading to death, is a little ironic I think.
But I think the author was trying to make a point. First of all, the narrator says at the beginning that he was told that all writers should write at least one story for children. He then illustrated why this should not be true; some people just aren't cut out for it. I think the author was trying to show that all people have their weaknesses and we cannot be expected to be good at everything.