> It would be ridiculous to say, in response to someone showing a hat they they've knit: "Why did you consider it important to knit yet another hat? What is the core benefit of this specific knit hat?"

Not at all. Knitting has a clearly defined purpose: to make a particular garment with a particular shape and pattern so that you can wear it, give it as a gift or sell it (coincidentally, I have detailed first-hand insider knowledge on this topic). But I don't think we need to continue this discussion because it doesn't bring me any closer to the answers to my questions, and apparently you don't have the answers either.