Roads are made for large dangerous machines that move fast and can hurt you.
If what you say is true, then cities should not have roads.
It's also why cities are taking back whole roads from cars when they can, as it's so hard to preserve a middle ground in a lot of areas.
The air was co-opted by planes... should we turn that back over to avian only traffic?
For the main point was that roads weren’t built for cars - cars co-opted them from people. It doesn’t have to be that way.