> > We estimate that these laws prevented only 57 car crash fatalities of children nationwide in 2017
> That cannot be properly evaluated without considering second and additional order effects, like everyone driving huge SUVs to fit these child seats. All else is never equal.
> > western society has a problem of "safety at any cost"
> No, I think just America. Europe isn't so safety crazed.
I would say that is a gross oversimplification. It depends a lot on country, on safety "area" etc.. For instance most European countries have much stricter laws around car safety (e.g. in Germany you have to get an extensive safety check every couple of years) and driver licences.
Regarding bicycle helmets I think this is much more a function of when the cycling culture developed in the country, e.g. in the Netherlands, Germany, Denmark biking has been a common way of commuting for a long time (way before helmets came about) and helmets are not that common, while in Sweden for instance most cyclists were helmets.