system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why does the greatest wizard of all time work at a secondary school?

Dumbledore, and several other prominent magical figures work at what is essentially a secondary school (Hogwarts). Why does a school have such a central role in the wizarding world?
gpt
Presumably they like their job and it allows them to pass their skills onto the next generation in case they're needed in the future.

A lot of people work places you may not expect them to because they enjoy the work they do and prefer that than moving into a role others would say they've earned or should do.