The first reason is that it is exam-oriented education now. Everyone attaches great importance to the scores in the exam, especially the teachers. Therefore, physical education class is not very important to teachers, so some schools are cancelled, or main teachers go to develop physical education class. I believe that everyone has encountered such a problem in their study career, which proves that it is not a case, but a normal state, because in people's cognition, only learning is the only thing.
Another is that if He Laoshi goes to occupy physical education class, no one will object, because the main teachers are very important to the students, and parents are also very supportive of these things. Although we now pay attention to the all-round development of morality, intelligence, physique and aesthetics, we still attach great importance to the scores of cultural courses in our schools, so many schools, students and parents think this is a normal state, because every teacher is selfless and wants to pass on more knowledge to students.
Therefore, in general, it is normal that the main teacher always occupies physical education class. There are two main reasons. One is that they are now in exam-oriented education, and scores are very important. Another is that many people acquiesce in this form, and not many people resist it. So over time, this phenomenon has become a normal state.