In dense urban cores, I think people (to the extent that they are able) can and will self select for what they prefer. IMO urban cores should be fairly hostile

In dense urban cores, I think people (to the extent that they are able) can and will self select for what they prefer. IMO urban cores should be fairly hostile to cars, in order to maintain space efficiency and work well for the largest quantity of people. If you optimize an urban core for cars, nobody has a good time. If you optimize it for throughput, at least people walking, biking, and taking trains/subways can have a good time. It's just a utility argument, but that's where policy needs to step in to nudge us away from a local minimum of every individual city dweller wanting their own SUV. There is endless suburban sprawl in the US that does accommodate cars, and people that feel the need to drive a massive vehicle are welcome there. And this is coming from someone owning 7 cars living out in the sticks. But when I did live in Seattle the train and bike infrastructure made the city so much more livable when working downtown.