We are complicated creatures and are very much affected by weather, time and a mirriad of other things.
The more people you interact with on the road the likelyhood of you having an accident increases. It might not be your fault but you are more likely to eventually meet someone who isn't as careful as you because: They're tired, late, don't do mornings, don't do evenings, don't like bad weather, don't like hot weather, they're female Roll Eyes or any other number of reasons why some people crash.