I disagree. I think stories like this are important. They teach you to take a hypothetical scenario seriously. It teaches people to ask "what if X were true?" and to seriously consider the ramifications. This is a springboard into abstract thinking. Without people taking the hypothetical seriously they will want to deal with concrete things and will have trouble with abstract reasoning.

Imagine you were trying to have a discussion about racism with someone. You would tell them "How would you feel if one day you woke up black and people were biased against you due to your skin color?" They would tell you that it's the dumbest thing they've ever heard. Who have you ever known that woke up with a different skin color?[0] For someone to take an argument like this seriously they have to be willing to engage in a hypothetical scenario. Waking up with a different skin color is as fantastical as the stories you're talking about. This means that they won't engage with your hypothetical scenario.

[0] This is an argument made by James Flynn in his amazing TED talk: https://www.youtube.com/watch?v=9vpqilhW9uI