I have a hard time seeing how you made the leap from "car drivers lack the personal qualities to responsibly operate a very heavy, very large machine with 40kW+ of power" to "we need to keep mandatory helmet laws".
Knowing humans, it would be nigh impossible to model any significant part of them to be more responsible without invading on their personal freedom, so the only option is to reduce the occourence of catastrophy stemming from said irresponsibility. That means we need to physically seperate car drivers and cyclists.
Knowing humans, it would be nigh impossible to model any significant part of them to be more responsible without invading on their personal freedom, so the only option is to reduce the occourence of catastrophy stemming from said irresponsibility. That means we need to physically seperate car drivers and cyclists.