Unless the documentation enforcer has power, they'll just be an annoying voice. I don't care what that documentation enforcer has to say if my boss prioritizes code over documentation. You'd need management buy-in at every level for a high-documentation culture/company to work.
The same is true for testing though. Lots of shops write as few tests as possible, if any, because the devs don’t have to so they think their way is just fine.
I went from working as the annoying guy asking for tests and docs to the manager and we saw a huge improvement in performance, feature release and a reduction in bugs hitting prod. I can attest their way does not work just fine.
Exactly my thought, these people will burn out and there's just no way around that. Sometimes you need people whose job is to burn out trying to pull others in one direction