To take this to its logical conclusion, once the streets are gone, there is no need for buildings anymore, so they can tear those all down and plant a forest. But then you wonder where you are going to put all the people who used to live and work there.
Typical walking speed is about 2.5 to 3 MPH suppose your government legislated a universal walking speed limit of 1.5 MPH. I think you can easily see that ridiculous laws create offenders, and the offenders are the victim of bad laws.