It's the biggest religion on the planet. Everyone believes the lines protect them. As long as everyone believes that, it works. But when you need help the most, it does nothing to protect you. It's just lines on some pavement, the people are the ones with all the power.
Rouds have material manifestations. The ground is different so driving there makes a difference. But historically, streets were the empty space between houses until the car industry lobbied to get the pedestrians out of the way.
Yes, true, and all used the streets equally. It was the car accidents and the victim blaming campaigns that blamed the pedestrians that invented the sidewalk. But roads existed before to get from one village to the next