One reason could be for getting attention. People might create a wild story just to be noticed.
I'm not sure specifically what the 'not real plane lady story' is about as it's not a common well - known story. It could be some fictional tale related to a lady and a plane in a made - up scenario.
Most of the so - called 'boys naked on the plane stories' are likely to be false or extremely exaggerated. Airplanes are public spaces with a set of regulations. It is unthinkable for a boy to be naked without a very serious reason. For example, if a boy had a severe allergic reaction that caused his skin to swell and the clothes were too tight and constricting, in an emergency, the crew might have to remove the clothes to help him. But this is a very unlikely scenario in the normal operation of an airline.
Perhaps it started as a joke among a group of people. They made up this story about the 'plane lady' and then it somehow leaked out to a wider audience. Another possibility is that it was part of a creative writing exercise that got misconstrued as a real event.
In some cases, it could be a part of a unique world - building concept. If the anime is set in a world where magic or some strange phenomenon can turn people into different forms, a girl turning into a baby - like form with a diaper could be just one aspect of that strange and interesting world. It can add a touch of quirkiness to the overall setting of the anime.
There's no way to tell for sure without more information. It could be a fictional story that someone made up for entertainment purposes.
One reason could be the tiger's territoriality. If the lady entered the tiger's territory, it might attack to defend it.
Some people might create such fanfiction for shock value. They want to stand out by coming up with the most extreme and unexpected ideas. It could also be a form of exploring the 'dark side' of a character, taking a well - loved hero like Naruto and twisting his character into something completely unrecognizable. Another reason could be that the writer has a very different and perhaps warped view of the Naruto universe and wants to express that through this very abnormal concept.
Another reason could be a very dark and alternative interpretation of the characters. Maybe the writer has a different view of Naruto's character arc and how he could be pushed to the extreme. And they see Sakura as a character that could be sacrificed in this extreme version of Naruto's story. But this is a very far - fetched view considering the original story's development.
One reason could be for the sake of creating drama. Writers might want to explore how the Naruto universe would be shaken up by such an event. It could also be a way to explore different character aspects of Naruto and Hinata that aren't shown in the original, like how Naruto would react to such betrayal.
One reason could be to explore the power dynamics within the Malfoy family. Lucius is often seen as a powerful and strict figure, and this could be a way to show how far he might go in disciplining Draco. Another reason might be to add a dark and edgy element to the story, appealing to those who like more complex and disturbing plotlines.