I don't think music and arts should be compulsory subjects at school.
Firstly, students have to learn so many subjects at school now. They must study both at school and at home. This makes student life so stressful.
Secondly, some students like music and arts while some don't like them. Maybe they like sports or outdoor activities or something else, so music and arts shouldn't be compulsory subjects.
However, they should be optional subjects and students should be encouraged to study these subjects if they can. We should also appreciate these students. The students who are good at music and arts are as great as the students who are excellent at maths or science.