What do you think about children stories with bad morals?

So for my ASL final the teacher assigned to everyone a typical fable that is common stories that deaf parents tell their kids that we're going to preform for kids. Most the stories have good morals but then I get this one where the moral of the story is, "if you really want something but can't have it then you should hate it and decide that you never wanted it in the first place" It even says that on the sheet of paper I was given that tells the story. The story is fun and cute until the moral part that I have to include at the end of the story. It's kinda... I don't know a strange moral to teach to children. If it was just a cute little story and didn't have a moral I have to explain at the end then I'd feel less icky. Like why am I telling children to hate what they can't have? I mean it's for a grade so I have to do it no matter what but I really wonder why someone decided on this type of moral for the story... Oh well. I guess childhood stories like Goldilocks isn't much better since it's about a little girl trespassing into a home and breaking/eating things that don't belong to her but at least at the end of the story it's not like "it's okay to break into peoples homes kids" lol