Its funny because (at least years ago) accidents would get posted on /r/idiotsincars , and like clockwork everyone would pile on the idiot in the car.
However sometimes the dashcam would be from a motorcyclist, and the video would get posted over in the motorcycle sub as well. There, no one would talk about the idiot, and everyone would shred the motorcyclist for poor defensive driving.
The takeaway is that most regular drivers think that they are totally powerless on the road, and have no ability to avert any situation arising from someone else.
Motorcyclists die if they don't learn this skill, so they tend to be pretty sharp defensive drivers.