I do not think "no discussion" rule is enforced to mean no any discussion at all. I have routinely seen and participated in discussing merits of certain answers, and nobody minded. The premise is however that there is a right answer to the question and it is knowable and findable, not just a matter of opinion that can be debated endlessly. Yes, some questions do not fit - but many questions that are complicated enough for me that I could not find it by myself without wasting a lot of time - do fit. Documentation is very different format - it usually shows you what tools you have, but not how to use them. Compare "here's a hammer, it is used to drive in nails" to "how do I hammer in a nail that is slightly crooked into a concrete wall?" or "Can I put a nail into a porcelain tile without breaking it?". The docs probably won't answer such questions.