Which is
exactly why so many people opt for the train over other modes of transportation. While I completely respect your opinion, although the plane may get your there faster (over distances of more than 250 or so miles, anyway), between the security checkpoints, carry-on restrictions, food service (or lack thereof), and too narrow seats that appear to have been designed for small children - you just can't tell me that's fun.
The long-distance train, however, has a dining car where even the lowliest coach passenger can order a steak dinner, and those in sleepers have a private roomette or bedroom (with restroom, some with showers) to retire to at night. And railroad coach is more comparable to airline first class, you can get up and walk around whenever you feel like it, go to the lounge car for a snack, or take pictures of the passing scenery.
Again, I respect your opinion - some people would rather fly and get to their destination in just a few hours. If you are really in a hurry, you probably are in no mood to watch passing scenery from the train or anything else - you just want to get there, and any delay thus seems tedious. Nothing wrong with that viewpoint at all. Others would rather drive, having the freedom to stop whenever and wherever they wish. Then there are those of us who want to travel the most comfortable, most relaxing, and certainly the most enjoyable way we can - aboard the passenger train watching America go by outside our window.
Incidentally, the decision to take the train isn't usually about cost, either, even though that is what many people erroneously assume. People sometimes pay more to get to take the train, when they could have flown or driven for less. Indeed, the railroads direct competition isn't really the airplane - it's the automobile.