It's population density. The UK is about the size of Washington and Oregon, but has 5x the population of those two States. And 35 States have less people than Washington.
We haven't nuked any rails that trains can run on profitably. I can drive 50 miles then catch a train to Seattle. I live in a little town of 3000 people, second largest city in the county. We open carry to the hardware and church, hunt with AR-10's (when you see a bear you don't want to manually reload), we have more snowmobiles than BMW's. We have rail running through our town, but no passenger cars, except pedal cars on the tracks on some weekends. Ya, it's the wild west, we don't really see why people are forcing trains up our *sses.