Because animation is different from TV series and movies, it is virtual. Therefore, people are more tolerant of animation, and think that the exaggerated characters in it are all right and will not make people jump out of the play. On the contrary, people will prefer that the protagonist in it is a second illness, so that she will feel happier when watching it and the whole person will be in a better mood.
Then the writers and directors of animation have mastered people's psychology, and often make the protagonist in their own animation into a second illness. Because the heroine is still cute and coquettish, but it is not good to be sick in the second year of high school, so the hero still has to come.
As long as there is an animation that is really like this and people accept it, then there will be many animations that do the same. This is also related to herd mentality, and people are more likely to accept that the man in the animation has a second illness. If the people in comics are not middle school students, people don't like watching them, so there will be no ratings.