Earlier quoted context omitted.
In any particular collision, a helmeted brain is more protected than a non-helmeted brain, although because of factors like risk compensation and the effect of overall cycling frequency on road safety that is completely beside the point. Of course adults should be free to choose for themselves what risks they are willing to take. The relevant populations are at so much lower risk for any number of misfortunes than th…
> Of course adults should be free to choose for themselves what risks they are willing to take. It's not universally the case though (see: drugs, seatbelts), and if you think it should be, you're in a small minority with that opinion. I think it's fair to consider externalities and then make laws that strike a nice balance between individual and collective interests. Bicycle helmets are a very small inconvenience, so…
Maybe in your community I would be? Where I live, it would be hard to find anyone who didn't feel adults should take responsibility for the consequences of their own actions. I really don't understand this compulsion to measure oneself against the herd, however. "Oh no some randoms I've never met might disagree with me!" Why would I care about that? Perhaps you're not so experienced with reasoned discussion, but "that's fringe" and "that's conspiracy" are not really arguments. By focusing on these propositions you've conceded the factual claims I've made, which by themselves really settle the question of whether helmets ought to be mandatory for cycling.
That assumption... is a conspiracy theory.
I haven't made such an assumption. I would still question the opposite assumption, however. Are you certain that no one values the primacy of the automobile in traffic?