Teenagers are involved in more fatal accidents than senior citizens, and people under 25 aren't far behind.

My grandfather drove professionally until he died in his late 80's, and never had one single accident. He started driving as a chauffer around 1920, and later worked for auto dealerships, garages, and other car-related busnesses. He even had a heart attack, in his 40's, while driving his family down Bear Mountain, an extremely treacherous road in New York State, and got through that without a problem. Some people are better at it than others, obviously.