coding standards – Does a third-party module need to implement hook_help()?

After having spent hours reading through (very old) coding standards and best practices threads on drupal.org, and even trying to revive the Contrib Development Best Practices group on groups.drupal.org which seems to having been abandoned for years, I’m still struggling to getting an answer to whether a third-party module needs to implement hook_help() to comply with the Module Documentation Guidelines or not.

Above guidelines state

All but the most trivial modules should implement hook_help().

Yet, should is not must, which sometimes leads to discussions within the Security Advisory Application Issues Queue.

I was not able to identify someone to ask, whether it is a requirement or a (strong?) suggestion.

As we’re currently reworking the PAReview (pareview.sh) tool, it would be great to know for having a distinct severity for a missing hook_help(). That’s why I’m hoping to getting a hint from the grey-bearded Drupalists here, on where to address this inquiry.

Don’t get me wrong, I don’t want to start a discussion here, nor subjective answers on whether there should be a hook_help or not. I just want to know which board is deciding such issues and where to ask when it comes to contrib module coding standards and best practices.