Well, not everyone likes to be scared. Some people are very sensitive and horror stories can have a negative impact on their mental state. It might make them feel uneasy or even cause anxiety, so it's better not to tell such stories.
Horror stories can create a very tense and uncomfortable atmosphere. In a social setting, for example, when people are trying to relax and have a good time, a horror story can be a real mood - killer. Also, some horror stories might be inappropriate for certain audiences, such as children or those with a weak heart.
Because they can frighten people, especially children. Scary stories might cause nightmares or make people feel uneasy.
Maybe it's because some of the real details aren't suitable for certain educational contexts or could be controversial.
Maybe it's because the real story is complex and involves some controversial aspects that are difficult to present simply in educational settings.
Maybe because some parts of the story are controversial and complex. Teaching the full story could lead to more questions and confusion for students.
Maybe because the real story is complex and involves some controversial aspects that are hard to explain simply to students.
Maybe it's because some fanfictions have poor writing or don't match our expectations of the original story.
There could be various reasons. Sometimes the plot is too predictable, or the characters are not well-developed. Also, the style of storytelling might not appeal to everyone's taste.
Maybe the truth is too hard for mummy to bear. For example, if you got into a big trouble at school like a serious fight, you might be afraid that mummy would be very disappointed or worried, so you choose not to tell her the true story.
There could be many reasons. Maybe they are afraid of being judged. For example, if someone has made a big mistake in the past, they might not want to share the whole story because they fear others will criticize them harshly.
Maybe it's because some parts of the story are controversial or not as positive as we once thought. There are issues like his treatment of indigenous people that complicate the narrative.