I was 'fortunate' enough to sit next to a girl that had ideas on me from Grand Junction Colorado all the way to Chicago. I would not have had that random encounter had I travelled deluxe cabin class. Writing about the hundreds of miles of corn fields going by has not a lot going for it whereas an expected girl meets boy experience has broader appeal. Also on the same coach were a couple I had met months before in Yosemite. Having them in proximity cramped my style as far as my new-found lady friend was concerned, this was a constraint that adds to storytelling. A cabin based romantic experience would not be so good and neither would a few moments of passion with an existing partner in a cabin really have the 'Mills & Boon' factor.
Food was a problem on said journey for me, in part due to the train being six hours late at Grand Junction, by which point I had eaten almost all of the luxury ready eats I had bought for the journey. Even the six hour wait was noteworthy - you cannot leave the station as the train could arrive at any moment. So, for me, it was the random happenings and the constraints of money, timetable and what you can do in public that made the journey an adventure.
The thing is that you cannot have an authentic travel experience and write about it at the same time. You have to live life rather than be there to document it.