Your argument is anti-scientific in a way. We see in nature that decentralized systems are more robust yet you are arguing the opposite.
Decentralization is not a virtue (or end) in itself when it comes to public infrastructure. Robustness is also not intrinsically tied to it, and there are a variety of senses in which the American road network is not particularly robust: congestion and unsustainable funding schemes are just the first two that come to mind.
Who cares about being interesting, I can go around outages in the network with a car where trains can't.
You should be arguing for smaller cars not less of them.
You, ostensibly[1]!
> You should be arguing for smaller cars not less of them.
I'd be more than happy to take both :-)