@bhtooefr We know for sure this is what will happen, because it already happens with all other laws, including cycling-related ones like not riding on sidewalks.
The problem with the NTSB and any other such organizations is that when you task some organization with safety above all else, that's all they will consider. They have no reason to care if helmet laws are unfairly enforced or if people stop riding bicycles and drive instead.
@bhtooefr Trouble is, you can always claim "nobody could have predicted" despite all the people who actually did predict, because there are always plenty of people you can point to who support the move. So it's a win/win for them and they will never be held to account no matter how many people die because of their decision.
And don't even get me started on the FDA's messed up incentives.