When I did my bike license the instructor outlined how different the approach to safety is between my EU country and the States. Here a helmet is required to drive. But not glasses. In US glasses are required, but no helmet. Meaning, the US cares about you not endangering other people, but you do you, whereas here they care about you not dying.
From a purely utilitarian perspective, the US approach actually makes more sense. And more donors. Win-win.