Responding to your 2nd point, kind of and kind of not. It's not just that air->train is hard, it's also that air->air is easy. You don't pay the cost of an addi

Responding to your 2nd point, kind of and kind of not. It's not just that air->train is hard, it's also that air->air is easy. You don't pay the cost of an additional security check or the cost of an additional drive to the airport. Even with a train directly connecting to the airport, the flight option may come out ahead.