Aren’t roads necessary from a “last mile” perspective for like, all sorts of things a functioning country needs? Last time I checked trains don’t run directly from farms to grocery stores and so we need trucks and therefore roads in order to get food to consumers, among other things.
> Aren’t roads necessary from a “last mile” perspective for like, all sorts of things a functioning country needs?
Yup, absolutely! But at least where I've worked on road design, the number of lanes on a local road is governed pretty much solely by the number of cars (trucks just have a larger impact on asphalt structure choices and, balance with the impacts of freeze-thaw, resurfacing schedule).
But this is about longer distance travel - trains generally being used for intercity travel vs highways. Even still, I don't argue against road subsidization, but rather in favour of more train subsidization.
They're necessary because cities are built around the idea that everything must be done through a car, so roads become necessary. It's a bit of a self-fulfilling prophecy. The underlying discussion is all about urban planning and how we want societies to organize space.