this seems to me a very US-centric thing. I'd never been lectured on wearing a helmet before living in the US, and was a bit startled to find the fervor with which people proselytized for helmets..
Most cyclists I see in Germany, Holland, Denmark etc, don't wear helmets. Their bike injury rates are way lower than US. So I guess it makes sense that US riders need helmets more ;-)
https://www.ncbi.nlm.nih.gov/...articles/PMC5227927/ "The United States has much higher fatality and serious injury rates per kilometer than the other countries examined, and has made the least progress in reducing per-capita fatality rates."
In Africa I'd always worn a helmet for road biking and commuting on the roads, seldom wore one for dirt or riding to the store. This seems to be typical for non-US countries, where most people are cyclists and a few are bike racers. Racers wear helmets.
Last week I did my first ride outside, on a trail, since March. I remembered to wear my mask protective gear, got home and realized I'd been riding without a helmet..
"It is a good feeling for old men who have begun to fear failure, any sort of failure, to set a schedule for exercise and stick to it. If an aging man can run a distance of three miles, for instance, he knows that whatever his other failures may be, he is not completely wasted away." Romain Gary, SI interview