You are correct, but we're not talking about urban vs rural, we're talking about dense urban with mature mass transit vs car-centric suburban sprawl. There it is unambiguous that dense is better, and can it be done well enough to even be cheaper than a lot of rural communities. There are no cities in America that are currently doing that though. They vary from pretty bad to terrible, and the ones that are only pretty bad are preposterously expensive due to crazy unmet demand for cities that don't suck. That's not a city problem, that's a North America problem.