Earlier quoted context omitted.
Helmets are for sports. Ebikes have a ~50% market share in Belgium where approximately nobody wears a helmet ever. It's really not an issue.
Yes and there’s an analogy here between car commuters and car racers. We don’t expect “normal” car drivers to wear helmets. But professional racers absolutely wear helmets. Even in the case of commuters, a helmet could save your life in an accident. For any drivers who thinks bike commuters need helmets, I would encourage you to also get car helmets for you and your loved ones: https://www.amazon.com/RaceQuip-253116-…
Also, you really -want- to have a helmet on in a race car - you'll typically have an unpadded roll cage right by your head, and the FIA-approved padding for roll cages is designed to work well with helmets, not with heads. I used to dread long road sections on rallies as I knew that an accident would be a real mess if there was any contact with the cage. There's more room in a road car, and there's padding / airbags etc to cushion you from impact on hard structures.