Mostly didn't want to have to deal with the kind of coworkers I'd have in a jail. Beyond the personality tropes you find with the people attracted to those roles, the local jails are constantly in the news for assault, drug dealing, the occasional fucking about and getting a prisoner killed. Just had one guard get convicted for blacking out driving home, crashing and killing a kid.

I can make that kind of money being an administrator basically anywhere, it's not worth it to work in a literal prison with even bigger asshole colleagues than normal.