Police and yes even teachers represent positions of authority.
Why would any decent person in their right mind want to hold one of those positions when the politicians calling the shots do not have an ounce of moral authority to back you up?
Why would she be hired in the first place?
It is likely that she is the best the “free” market could come up with.
They could double whatever the sub pay is and she’d still be the best that would step up.
You’re right. Teachers — especially young teachers with just a few years under their belt — are leaving the profession in droves. The old hands are sticking around, but only to secure their pensions, then they flee. Nobody wants to be around today’s kids.