What got the system to exist in the first place has more relevance to what its purpose is.
Ask the rock artist what its purpose is.
If you put your own purpose into it, you’re repurposing it rather than giving it one from scratch—otherwise it could’ve been suitable (fitting) for no purpose.
Until you ask the artist, you’re really just giving “just so“ stories/narratives. And if they don’t recognize the consent of all stakeholders, those stories are false… in every way it is possible to be false.