Reddit moderators are, by and large, terrible people. If they quit, as the guy in your link is threatening to do, they can be trivially replaced. It is not a thing that requires much skill.
There is no shortage of people who would volunteer for something like this. The replacements might even be less terrible, both at the job (reddit is stiflingly over-moderated, as documented on r/undelete and r/redditminusmods) and in their dealings with users.
