[ghaff]

Yeah. We do (or should) typically drive "defensively." But in practice that doesn't mean that we defend against everyone potentially pulling some utterly crazy stunt at any moment. For example, we watch for pedestrians but we don't actually worry too much that there might be someone hiding behind a tree who is going to jump into traffic. And we may be somewhat cautious at cross-streets but we still have a general expectation that a car isn't going to just randomly blow through a red light in the middle of its cycle.