Vietnam and China were country with huge population of daily bikers. People used bike for all walks of life, even traveling very long distance. None of them man

Vietnam and China were country with huge population of daily bikers. People used bike for all walks of life, even traveling very long distance. None of them mandated helmet wearing for decades. And AFAIK, the number of death or serious injuries was virtually zero. Maybe today bikes are a bit faster, but I don't think it makes any significant difference.