So you're fine with a key that doesn't open anything? How will you know it is a key at all then?
>We try to understand countless things without have a use case in mind at the time of study.
You're making a pretty clear reference to mathematics & science here, but in those disciplines we study things with well-defined structures. We don't study flighty nonsense because it's not ever going to be useful. You shouldn't invoke this phrase to excuse a lack of precision and clarity.
