There's an error in that sentence.
Actually, the politicization of the education system has destroyed the education system...and that has destroyed parent-teacher relations.
Note here when one says the system has become politicized, that is not quite accurate. The system has become overrun not just by politics in general, but by a certain kind of politics...Marxism and its new step-child, Wokeness. It is doubtful that the education system, in its current state, can be fumigated in a way that removes the political infestation.
So that means a restart.
Teachers who can prove they are not political might have a future. Others...NO.
You are more accurate than the author in your observation.