Going over my answers on the election questionnaire, I noticed a contradiction between the Good Subjective, Bad Subjective page and Worldbuilding Too Broad close reason:
There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.
Guidelines for Great Subjective Questions
2. Great subjective questions tend to have long, not short, answers.
It may be helpful to users to clarify this point, as I've seen that close vote definition argued as a reason to put questions on hold, when it's clearly at odds with SE policy.
I also believe that "There are either too many possible answers" is also at odds with the subjective question guidelines.
Moms4mom was an early Stack Exchange 1.0 case study in subjectivity. The owners knew from the outset that the topic of parenting was inherently and deeply subjective, a fundamentally bad fit to our engine. Parenting is one of the most subjective subjects I can imagine; every child is different, every parent is different, and whole cultures are wildly different in how they approach child rearing. After all, who can say for certain what order one should watch the Star Wars (saga) with your children for the first time?
Worldbuilding is a lot closer to Moms4mom than it is to Physics on the subjective scale, and possibly even surpasses it.
It is possible for a good, well defined subjective question to have multiple deep and well supported answers that are very different from each other.
This is not a bad thing either, since SE strives to be a repository for ideas, and an answer that works well for one world may not fit in another. More points of view can help out future world builders as the top answer may not be the one they need.
Solution? (first draft)
Answers would not have enough depth. Good subjective questions encourage answers that are deep and well supported. Bad subjective questions encourage answers that need to cover a lot of different points. Please add details to narrow the question down to a single point. Multiple questions may be needed to cover all points.