I ride on roads that have potholes and – recently – have been poorly surface-dressed. This increases the likelihood of me crashing my bike. Whilst it is commendable and desirable to lobby the council to fix the problems with the roads, that neither affects nor should preclude putting my helmet on to make me (feel) safer.
And if i am in the situation where i think i might crash because for a better idea my actions then i will wear a helmet. But if i am going under the wheels of a 40′ trailer why bother?
and there is nothing stopping you wearing a helmet, no one is saying don’t wear one. But if your riding to the corner shop or to work on a smooth pothole free cycle path, you might decide you can’t be bothered to grab your helmet, the hassle, helmet hair, hot day, etc etc.