becoming an officer in the salvation army requires signing documentation. Likewise ministers need to be ordained.
So maybe expand the definition of regulation to include public institutions which have defined rules or codes of conducts. Leaving out the clanging irony of the multitude of crimes committed through organised religion.
Journalists is a weird one. I think back in the day it would have been that they trade on their public reputation. Less so now when I can start up a blog on college sports and call myself an investigative journalist.
I honestly don’t know. Maybe a carry over from print journalism?