It doesn't matter if you lose more fingers if you lose fewer brains.
Also (2016)
* Deciding to cycle for short or leisure trips is lower friction (I always wear street clothes, too.)
* I can hear better.
* I find myself more careful about intersections.
* Motorists seem to give me more room.
* I have one fewer item that can be stolen.
——
On the other hand, I find the helmet benefits to be:
* My head is better protected in a crash.
* I feel more confident choosing cycling for strenuous commuting.
* People aren’t as worried about me. :)
* Wearing a helmet only protects the head from a limited number of possible injuries.
* Wearing a helmet makes people overconfident and overly risk-taking.
* In the Netherlands, very few cyclists wear helmets because they are experienced by cycling almost daily, don't take unnecessary risks and street traffic design is far superior.
* Wearing a helmet looks dorky.
* Wearing a helmet is proven to cause vehicle drivers to respect bicyclists' space less, leading to more fatalities and injuries. [0,1]
0: https://www.bicycling.com/news/a25358099/drivers-give-helmet...
1: https://road.cc/content/news/252652-study-still-indicates-dr...
Conclusion: A helmet is unnecessary for experienced cyclists who are only going 10-15 km/h in proven safe traffic-designed areas, all other use-cases: it depends.
??? Road bicycle helmets leave the ears completely uncovered.
I don't understand. Did you just say that helmets offer no protection from head injuries?
I feel like the emphasis on head gear is just a way to avoid the real issues.
I'm inclined to think cyclists in a whole bunch of gear do take more risks, but this experiment doesn't really do much to prove that. Headgear offers no functional protection in the BART, so the effect must derive entirely from some more general, irrational, feeling of security.