Note the picture says “urban”, not rural neighborhoods. There’s no reason to think we can’t have train infrastructure connecting to rural areas though. The point would be to make our infrastructure human centered and supplement it with appropriate public transportation based on density. It can be done by rethinking how we zone and getting away from designing everything with cars and space for cars in mind. Not saying we do away with cars because they definitely serve a purpose the way we have things now, but gradually build up the non-car infrastructure so that cars are less needed over time. If we can imagine it in a way that works, we can accomplish it.