I can't tell you how many accident and injury cases over the years I've been involved in where alcohol played a role, but I can tell you that there have been many. There are a number of reasons why drinking and driving, boating or taking part in recreational activities is so dangerous – and all that has to do with our human nervous systems.
We lose judgment
We lose depth perception
We lose reaction time and
We lose higher cortical function
Loss of these normal brain functions coupled with the fact that cars, trucks, boats are dangerous, powerful, fast machines set up the perfect storm for accidents causing injury and death.
I have no doubt that if we were to due a failure analysis on any alcohol related accident, we would be able to track the reason the accident happened to a loss of one or more of the above functions.