Earlier quoted context omitted.
Yeah the only use case where trains make sense to me, is really heavy cargo, where the lower friction of the wheels make it more efficient. That's a use case where both flying and trucks will be at a disadvantage. Transporting people in trains doesn't really make sense to me. You can fly if you need to go fast, take a bus if you have time, or drive a car if you want flexibility.
Where there is enough population density and 'right of way' for trains, trains almost always make sense. Flying is better for NYC -> Colorado - LA but trains are better for NY -> DC corridor, and frankly, probably all the way down to Florida. There is the issue of 'downtown' and 'walkable cities'. If you arrive in Baltimore near an airport, you have to rent a car. In European cities, you hop on the Subway to the Hote…
You will come really close to that if you build a road that has the same level of right of way, and drive buses. The benefit of (expensive) bridges and tunnels are not unique for trains. Some of the subway trains in Paris run on rubber tires.