Then the car serves as the immediately threat to the other car, no the cyclist. This why you are supposed to drive defensively when operating a motor vehicle, so sudden changes in a situation doesn't cause you to crash into someone or something.
When you're behind the wheel of a car, yes. When you're around a car, no.
Even if someone's driving defensively, sudden changes in the environment lead to a more dangerous situation. If they're driving defensively, hopefully they can deal with it, but that is no reason to create dangerous situations in the first place.