The students in this grade are still immature, and this system is to protect minors. The reason why teacher-student love is strictly prohibited is mainly because most students are still young and lack the consciousness and ability to decide whether to have sex at a young age, especially primary and secondary school students, who are generally under 16 years old. If you have a relationship with a teacher at this age, you are likely to touch the bottom line.
Unequal relationship and teacher-student relationship are unequal. As teachers, the party has the initiative, because teachers have some power. Most students are at a loss and under great pressure when their teachers take the initiative to express their love. This is different from a normal relationship. Maybe students will consider all kinds. If they don't agree with the teacher's love request, will they be threatened and retaliated? At this time, they will feel very scared and agree to associate with the teacher under this disguised coercion, but this behavior becomes an act in which the teacher uses his rights to sexually harass the students.
Moreover, even if the teacher-student relationship is normal, if the teacher-student relationship breaks down, if the student threatens the teacher with their relationship and does something that violates discipline, then most teachers can't resist, and even some teachers will take special care of the students who are in love because of their relationship with the students, which is unfair to others.