You know what else doesn't attract dedicated professionals to teaching positions? Attacking teachers.

People don't choose profession based purely on salaries. They also want good work environment. No person will think "yes, this teacher was hurt by students but he was bad at his job. I'm I will be fine".

And yes, the government is the one responsible for creating good job conditions for teachers by ensuring good infrastructure and proper staffing but teachers will tell you that kids are not exactly getting easier to work with. "Bad teachers" argument is pure victim blaming.