that's an interesting point, but in practice I don't see how it's meaningful. If you write down a plus code and end up in a similar area, you contact the person with the address and figure it out without much issue. If you can't contact that person again, well you're at least most likely to be in the area and can ask around for directions.

with w3w if you can't contact the person with the address again, you've no idea where on the planet this place might be.