Well, according to ray_m, "There are no 'open' documents on the forum. We only have discussions and questions. Documents are only being used to post Driver Release Notes and FAQ's and they are all locked down, preventing commenting, therefore the 'helpful' option is not available."
So documents cannot be marked as helpful, and marking a document as helpful is part of the "onboarding" questline. Ergo, the onboarding quest line cannot be completed. The solution then, is either to drop the quest line system so the issue doesn't continually come up, allow documents to be marked as helpful, or remove that criteria from the onboarding quest. So far, none of those has happened.