The law against jaywalking is an excellent law. Look at some of those colorized YouTube videos of cities in the early 1900s, like this one: https://youtu.be/1Ok_lwYyHWo

It’s insanity. People dodging cars, cars dodging people and each other. At modern road speeds that would result in mass death.

Besides all that, yes of course we live in a manufactured environment. All environments are manufactured to some degree. And of course car companies lobby for things. But lobbying is not guaranteed to win. People strongly resist things they don’t like. You know what else GM was doing at the time? Selling lots and lots of cars to people who wanted to buy them.