The design of the schooling system is not finished, and may never be finalized, because the needs of the powers that be are ever-changing as the world environment they exist in keep changing over time, and also because the needs of the children students are so individualized that no two students need the same thing to learn the same material. The purpose of the design of the school system is to match the needs of children growing into themselves with the needs of the powers that be, such as the governments and powerful organizations (the larger society as a whole).
This means that a teacher who cares about a student cannot trust the system completely to care for the student, the teacher has to form a personal relationship with the student to help them develop and grow effectively. This is because the system is not designed for that specific student, but the teacher can form a relationship for that specific student and their needs.
Due to various complex factors that are still being studied, the pressure on students has only gone up, and nowadays students are expected to basically be adults at an outrageously young age. Their childhood and adolescence are not being recognized at all, but are rather treated as adult but are not respected as adults. In some sense, the opposite should happen: You should respect their sovereignty, but remember they’re still children who need help to grow.
Because of this insane pressure, and because of the reality that they’re not fully matured adults, students come to expect a certain level of care from the overly demanding schooling system. A baby will demand care from whoever has power over it. Because power (at least between humans) is naturally a two-sided relationship. “You can have influence over me, but I will only allow it if you care for me. If you neglect this care, I will rebel and take the power for myself (with the intention of caring for myself the way you failed to).” This level of care students come to expect is too much for teachers and administrations to meet. So they fail to. And students are regularly let down and are neglected.