>The big advantage of air travel is exactly this, you don't need to spend much time in the actual plane. And the passengers are by definition under full-time supervision by other passengers, so stealing or attacks are not so easy to get away with.
There are also drawbacks to air travel that you're not mentioning. I was in a sleeping segment with 5 other people and felt more safe than in an airplane. The important thing though is: we need to cut down on carbon, and travel by train is an important way to do it.