When people are driving and talking on their cell phones, and they suddenly find them selves in dangerous spot because they were distracted, why can't they seem to make the connection and GET OFF THE PHONE?

We’ve all experienced it. People drifting across the lines and getting startled by other drivers honking at them, pulling out in front of people and getting startled when other drivers honk at them, things like that. Why can’t they seem to make the connection that it happened because they were talking on the phone?