So security cams at a train station aren't an issue because technically no one is forced to use this public facility? Whether someone is forced to attend school or not doesn't change that a school is part of your public life, not of your private life. Teachers and other students will be able to look at you, what difference does it make whether a camera is pointed at you or not?

No one is forced to turn on their own webcam, either. It's just a thing that benefits everyone, so most people do it. Reading peoples faces is very helpful in conversations, just like it is to hear their voice.

The point isn't to have students look at a camera, it's to have the camera look at the student. The benefit is that software can notice when a student stops paying attention. Or discover cheating during tests. Or bullying. Teachers can work with this feedback to improve and students can be reprimanded based on this.

It's not very helpful for other things, but during my time I would have very much appreciated something like this, if it could help in suppressing the students not interested in learning. Those were the biggest obstacles back in elementary school. It is very unfortunate that there are no immediate repercussions for bad students. Pointing a camera at each students face could act first as a deterrent towards bad behaviour and second as evidence for the consequences the student will experience, especially for their parents.