Can anyone explain why it's believed this "would make no sense"?
I think the idea is that you can't really cover 100% of real-life cases in "code", either legal or software, so the areas you'll leave this out of would be those "not-entirely-strict" parts.
It is therefore quite hard to create a formal system to refer to objects in the world in a way which induces no contradictions with intuition. This is why we have courts, among other functions of government.