Earlier quoted context omitted.
The EU is only about half the land area of the USA; Germany is roughly equivalent of the fourth largest US state, Montana, and only CA, TX, and AK are bigger. Do any states have something equivalent to this?
And Germany has a population of 83 million. Montana has a population of 1.1 million. I don't get your point.
On the density front, NYC is famously high density, and yet so far as I can tell a monthly pass for just there is double the raised price this ticket will be next year: https://new.mta.info/document/118601