Teaching is one of those careers where the expectation is on the teacher to endlessly do more and work harder, "For the kids", and if you keep doing it, you'll work more and harder forever, endlessly.
My brother does a fantastic job, and works very hard for his students. What he does though, is walk out at 4pm and NEVER does work at home. He doesn't check his emails, he doesn't grade work and maybe only once or twice in five years has he done a lesson plan outside 8am-4pm.
If parent emails, or meetings, or "school paperwork" or whatever queue up he just makes it infinitely clear that he must choose between doing the best job for his students, or spend time with the parents or at school meetings. He does do thing pro-actively like call parents if need-be, but he does not spend hours of his personal time dealing with "helicopter parents" or stupid school meeting requirements.
It requires the right balance of "push back", but it can work very well when done correctly.
FWIW, he has quickly been promoted to the head of maths and had a real shot at a "leading teacher" position, so obviously he's very good and the entire school-body agrees.