The thing about helmet is that it only helps protect the head and even there only partly. You might still have broken bones, bruises, shoulders, knees that hurt

The thing about helmet is that it only helps protect the head and even there only partly. You might still have broken bones, bruises, shoulders, knees that hurt for a long time for various reasons, but hey at least we had a helmet. So we are talking about avoiding TBI. But TBI not only happen on a bike. Accidents resulting in TBI happen at home, no one wearing a helmet, or in cars. And for cars helmets were developed. And the same people saying cyclists must wear a helmet start calling you stupid for wanting passengers in a car wear a helmet, because "they are not race car drivers". In the end they are kinda right and shouldn't have to wear a helmet. It's much better to make the road safe for everyone. And then a helmet for cyclists is also not necessary anymore.