Lynn, you and B. Carfree have legitimate views but miss the big picture.  We outlaw specific behaviors and reduce the number of drivers indulging in them but the basic incompetence they display manifests in some other way.  We dramatically reduce drunk driving after years of education and big fines but the accident rate, the death toll doesn't change much.  Drunk or sober bad drivers find ways.  We have laws giving right of way to pedestrians and expect drivers to "share the road" with bicyclists but those laws assume all drivers have the ability to observe conditions and react in a timely fashion. They don't.
We outlaw texting and driving but morons who do it believe they're the exception.  After all the state gave them a license so they must be good drivers, right?  They're not.
I suppose we really shouldn't blame them.  They're average people going about their lives secure in the false comfort that the state standards of performance define competence behind the wheel.  They don't.