To be clear, these areas aren’t just fuzzy because mappers haven’t worked it out yet. They’re fuzzy because the real world doesn’t care about the same degree of exactitude when it comes to these large-scale natural features (or neighborhoods very often). Calling it a first pass implies that anyone knows the one right answer or could somehow measure it.
A node doesn’t suffice for something that’s fuzzy but roughly linear. This is similar in a way to the discussion about seas: