I should wear a helmet, right?
Most motorcycle accidents occur at relatively slow speeds and in city traffic. In fact, the most frequent fatal accident involving motorcycles is the one where a car left turns directly into the bike's path, causing the bike to bury itself in the car's side panel and the rider to fly over the top, usually landing head first. You don't have to be going very fast for this one to kill you.
The State may or may not have any business telling us that we have to wear helmets under penalty of law, but there is another much older law at work here. Known as "Selective Evolution," "Survival Of the Fittest," or just plain "Thinning the Herd," it means that those who always put on their helmets are more likely to survive than those who don't don't. Your choice.