Have you ever stopped to think that people like some fucking freedoms. I don't really feel like going where politicians let me, when the politicians let me, after an anal probe and piss test. Cars provide freedom and that is what America is supposed to be about.
The second we are dependent on the government(see public transport) is the second America is dead. We are getting closer every day and it's sad. You can talk about the economics of it all day and you are probably right... economically I am guessing it beats out the car/plane system by a long shot. Who cares? I want to be able to get places fast and on my schedule. We are advanced enough at this point we don't have to make everything the most efficient... we can have some freedoms and fun FFS.
Your points about industry using trains makes no sense... are you saying we should be treated like raw materials and cattle. Shipped and offloaded like a resource that the government uses to make tax revenue? You have fun, I'm going to keep driving my car, thanks.