After a week of driving and sleeping in Europe, I noticed that I only heard one super-loud obnoxious car [1] or motorcyle, and I never once was blinded by too-bright headlights, not even coming up over a rise and catching the lower part of their beam. And of course didn’t get bright-lighted even once [2].
So it can be done. We just choose not to, because free-dumb isn’t free.
[1] An American Mustang GT of course
[2] Don’t even get me started on pickups and the possibility of rolling-coal