system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why would someone employ Filch at Hogwarts and for what purpose?

Anyone got a reasonable explanation what a grumpy, bitter, old and frail Squib is doing at Hogwarts? He certainly can't one up the literal army of house-elves... or anyone else with magic for that matter. Is he just there because dear Albus is overwhelmed with pity and forgiveness once again?
gpt
The house elves are slaves, literally. Except for Dobby. They have to obey their masters and do the cooking and cleaning.

Filch, on the other hand, is a caretaker. A custodian vs a janitor. His job isn't to clean, it's to manage that army of house elves and to argue for his department in cases where the house elves could not.