It would be safer if we were all riding the train/bus. Getting in a car in america is accepting the risk that you share the road with everyone. no matter the qualifications or mental state we still all gotta get to work/grocery store/wherever, and the only way is by ~4000 pound metal speed box.

Worrying about safety on the highway is about making sure you are in situations you can handle and react to, staying attentive to the styles and mental states of other drivers and being a step ahead of the road conditions