We should link to How to write the perfect question from the on-topic help page, in the paragraph after the lists of what is on- and off-topic. That paragraph currently reads:
Note that questions must be specific as well as answerable. If you are looking for discussion, brainstorming, or an overall process rather than specific question-and-answers, the Worldbuilding Stack Exchange might not be a good place for your question. Such questions may however be welcome in Worldbuilding Chat. Also see Good Subjective, Bad Subjective for why this type of question is hard, and some guidelines on how to post good subjective questions which are less likely to end up being closed.
If we could edit how to ask a good question I'd also link it in there, but that page isn't currently editable by moderators. (I've asked on MSE if we can change that.)
I don't think the risk-factors post in its current form is a good candidate for linking in the help center. It's long and the question (itself long) is more "inward-facing" (addressed to the community). I'd worry that a new user would stop reading before getting to the important stuff. People can and should link to specific risk factors (answers) when appropriate, and the content of that page fed into the perfect-question list, so I think we'll be covered if we make the changes I've proposed.