It's evidence that it is popularly interpreted as something that has value and can be traded. So is money. I really can't care any less than I already don't if Bitcoin is or isn't a legal currency.

The point is it isn't commonly purported to be a 'settlement layer' but something else entirely.

I don't disagree with anything you've said. It's just that the government classification doesn't support (or refute) the point because the government isn't a disinterested party.