So which city are we going to tear down and rebuild first? And we have to come up with some new laws, like you can only own a home that’s within walking/biking distance of your work.

We had a taste of a viable alternative, thanks to the pandemic. Remote work - it accomplishes most of what you propose without totally ditching private transportation. Maybe we should make that a law - business has to show that physical presence is required or they must allow employees to work remotely.