Just… Don’t care? Let people in and adjust the distance with them. Driving is an involved process, get a car with adaptive cruise control if you want one that will do exactly that for you.
I guess it’s more than just “caring” - I feel that we’d all be a lot safer if we were all going the same speed instead of inviting people to dodge in and out
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
Unfortunately I can’t see how public transport would be feasible without accepting that the vast majority of places I might want to go are simply inaccessible, and the places I could go would take 3-5 times longer. Case in point, there are no public transportation options to get to my son’s high school. It would be a 35 minute bicycle ride. I can drive there in 12 minutes. Getting to my local Wegmans would take 37 minutes by bus. I can drive there in 9 minutes. I live on the outskirts of a medium size city on the east coast in a low density residential neighborhood.