I can think of two redeeming qualities for such sets of rules, if applied and understood correctly:
1. Eliminating indecision. If figuring out what to do is too difficult (or none of the options are better than others), you have a somewhat sane defaults to fall back to. Indecision has costs too.
2. Making things more predictable upstream. Authorities may make up some rules that may not be most effective when applied by the bottom line, but they normalize the entire bottom line, making it easier to manage. This is similar to what we do with frameworks in software - we trade efficiency and flexibility for consistency, in order to build an abstraction layer that's less complex to work with. Misapplied, this of course leads to tragic/comical examples, both in organizations and in software (e.g. Electron).