As mentioned before people don't wear helmets for most things because they do other things to reduce the risk... Like walking on the sidewalk not the road, crossing at a crosswalk not the middle of the road... Like holding onto a banister while walking down/up steps... Like having handholds in showers... Like having airbags/seatbelts in vehicles, like almost everything in life most people do, do things to reduce whatever the risk may be... Oh, Like having mad cycling skills and never crashing...
