The FAQ article Question Close Reasons - Definitions and Guidance simply explains the standard set of reasons that questions are closed on Stack Overflow. But it doesn't seem to include a clear explanation of why we use these specific reasons.
I'm already aware of What is the point of closing questions for details and clarity, debugging details, needs more focus, or very low quality? which I recently worked on, to justify from the asker's perspective the fact that poorly asked questions should be closed in general; and I think it's self evident why the features in the title make a question "poorly asked". I also created Why should I help close "bad" questions that I think are valid, instead of helping the OP with an answer? to explain from the answerer's perspective why question closure is important in general.
But I think it's not self evident, simply from the descriptions, why "Primarily Opinion-Based" and "Seeking recommendations for software libraries, tutorials, tools, books, or other off-site resources" are in the standard set of close reasons. Simply referencing the goal of a Q&A site, or pointing at the tour, doesn't seem like a complete explanation either.
Where on Meta can I point users, to justify these closure reasons to them?