The distances involved often lend themselves to air travel being more convenient even if there are trains. There's a sweet spot for distance where trains make the most sense, but after that a plane will end up being faster even with all the dead time at the airport.

I live in Dallas. Door to door, a train would be faster and more convenient than a plane for me to go to Houston or Austin. A direct flight will always be faster and more convenient for me to go to Denver, San Francisco, Chicago, New York, Orlando, Seattle, etc.

Dallas to New York is ~1,400mi. That's like Madrid to Warsaw. It'll take me ~6 hours everything included to go that distance by plane. What's the travel itinerary for Madrid to Warsaw? Is it direct (same level of convenience)? Is it faster?