You made a decision that you're happy with the risk of not wearing a helmet when walking, but you decided that the risk when cycling was enough that you want to

You made a decision that you're happy with the risk of not wearing a helmet when walking, but you decided that the risk when cycling was enough that you want to wear a helmet. I don't care why you made that decision. It's not relevant. Other people made the decision that they're happy with the risk of not wearing a helmet when cycling. What is so special about you? Are you some kind of super-powered genius, and your assessment of personal risk is some kind of magically "absolutely correct" answer? Why should your personal choice about acceptable risk be made law? (Trick question; it shouldn't)