If you want to go from New York to Los Angeles, you have a sub-5% chance of paying a fair price. Most often, you'll find yourself paying a ridiculously high price because you booked your ticket to close to the date, too far away from it, on the wrong day of the week, or in the wrong season. Then you get shitty service the whole way, including 40-minute security lines and $25 baggage-check fees. If you spring for business class (domestic first) you get service that was almost as good as what coach offered 30 years ago, when flying wasn't horrible.
Trains aren't even an option for mid-distance travel, due to the infrequent schedules, equally absurd fares, and slow speeds (comparable to cars, except on Acela, a "high speed" service that goes 120 mph).
We have good highways in the U.S., and people drive a lot in this country because it's the only mode of transportation that actually works (for a family of four, it's cheaper than air and rail, which is just fucking absurd) but it's just not safe to drive them faster than 80-90 mph average speed, and legally you can't even go that fast.
New York is the only city with "decent" (by American standards) public transit, and that's still not enough to slash housing prices to where they'd be with an extensive transit network. (Note to all: if you pay urban rents, you'd benefit from a better public transit system even if you never used it, because it would de-crowd the city.)
We're amazingly good at shipping electrons, but we've given up entirely on moving humans.