[pandaman]

>Cycling without a helmet may not be statistically safer. See for example "The Ultimate Question: With or Without a Helmet?"

I believe you wanted to say "may be statistically safer" because the article you referenced tries to infer that helmets cause more accidents even though significantly reduce the number of fatal/serious ones. What if construction workers also want to be "statistically safer" in this sense?

It's trivial to see that PPE that prevents fatal and debilitating injuries is going to increase the total number of injuries as a person, who otherwise would have died or stopped participating in the dangerous activity forever, can go on and accrue more minor injuries.

[logicalexplan4]

That could be, my point is that people can not be wearing a helmet because they think it is better not to do so from a safety perspective. They could be making a deliberate decision that they think is in their own best health interest.