your point seems to be directed at how human discussions happen generally and how we must necessarily abstract away details to even have those discussions at all.

but we sometimes collectively need to grind through the ruts a number of times before finding a good solution, especially if the solution involves a variable abstracted away by the model.

so why specifically does your noted pitfall need to be avoided? and what alternatives can you offer?

but more to the point, what's the model of car-centric cities you'd advocate?