I think the main problem is that so many people do take driving safety for granted. They tend to do some really stupid stuff behind the wheel. For instance today my life was threatened three times on a 19 mile shopping trip. The first time was the worse, A car swerved into my lane and was heading straight at me almost hit the car that was coming up behind me, and continued to swerve dangerously after narrowly hitting me (a cyclist) and a head on with another car. Second time was an attempted right hook by a U-Haul truck, and the third was a pick-up backing out of a driveway too fast.
After that I deciced to stay in the rest of the day.