This question involved many factors. Different authors and works would have different situations and reasons. But generally speaking, anime and novels were created in different ways and targeted at different audiences, which might be one of the reasons why authors did not want to write novels. There was a huge difference between the way anime and novels were created. Animation was usually based on sight and sound, while novels were based on words. This difference may cause the author to feel challenged when writing a novel because he needs to better adapt to the form of the text and pay more attention to the plot and character creation. There was also a huge difference between the audiences of comics and novels. Comics were usually targeted at young audiences, while novels were targeted at a wider audience, including adults and young readers. This means that authors may need to better understand the needs and preferences of different readers in order to better meet their needs. Lastly, some authors might prefer to focus on anime or games rather than novels. This might be because the way anime and games were created allowed them to express their creativity more easily and also made it easier for them to achieve commercial success. In summary, the difference in the creation methods and audience groups between anime and novels may cause authors to feel challenged when writing novels. At the same time, there may be many reasons why authors do not want to write novels.