I did a casual bike tour through hundreds of miles of Netherlands and Belgium. We wore helmets, obviously. Not wearing a helmet is inconsisent with having many standards for reflectors and traffic planning. Although someone maybe slightly more careful, falling on a bicycle means a risk for head injuries. Why not take reasonable precautions, including instructing people that helmets do not add safety to anything besid…
The Netherlands has a much much lower incidence of head injuries not because they wear styrofoam hats but they realized it's better to stop the trucks and cars from driving into people than in vain trying to soften the impact. Creating secure bike routes just has a tremendously higher return on investment compared to convincing people to wear helmets that bringing them up just labels you a shill in many peoples eyes, a concern troll distraction.