Right, but the promise of self-driving vehicles is about them being safer than humans. Humans are irrational and impulsive. Those actions disrupt the flow of traffic. The idea is that a self-driving vehicle can be safer than a human because it will do things like follow speed limits, always come to a complete stop, etc.

If self-driving vehicles are simply going to operate like facsimiles of human driving behavior their benefits are greatly diminished.