Dude wtf are you talking about, the world is a very different place now to what it was 10000 years ago. It's not that I can't imagine a world without cars, its that the amount of shit that would need to be done to remove cars from modern life would be a massive, slow, expensive project. You'd need to completely redesign cities and pour incalculable amounts of money into the project, while huge swathes of the population protest rabidly against the changes.

Like, sure you can plan changes to cities to reduce the reliance on cars, but its a long, slow process that takes a huge amount of time and political will to enact. Just saying "ban cars" is an incredibly simple minded, knee jerk reaction to the issue.