Just looked through DB's annual report. There's no mentioning of any passenger rail operations in UK. It's "just" DB Cargo. So I don't understand what this "fact" has anything to do with passenger transportation in Germany.
By the way, Cargo is the mode of operation where most profitable rail companies are. Hence the dualism of loss-incurring Amtrak and profitable North Amercian freight operators as well.
DB Cargo is producing more losses than the other branches, i.e. passenger rail. It doesn’t generate profits like in the US (shorter trains, more single rail car traffic, shorter distances, infrastructure held up to higher standard thus more expensive, lower priority compared to passenger rail)
By the way, Cargo is the mode of operation where most profitable rail companies are. Hence the dualism of loss-incurring Amtrak and profitable North Amercian freight operators as well.