I am guessing a large number of us in here have nothing to do with the airlines anymore (I haven't flown in 10 years and do not miss it a bit) and while airline pax get stripped and pawed before being tied into a thin seat with 30 inches of pitch, we are relaxing and enjoying our Amtrak travels.
You may be guessing wrong
Just because a few choose to be Luddites does not mean everyone is becoming that way.
And of course the bit about "stripped and pawed" is just an overstated fantasy of those that for unknown reason need to repeatedly justify their own choices about the mode of travel by dreaming up nonsense.
Just for the heck of it let's hear from anyone here who has been stripped and pawed by TSA.
Inconvenient due to long lines? Yes. Stripping and pawing? In general no. You may be thinking of Israeli security for those that get profiled and chosen for closer attention in an isolated room, rather than American TSA.
Um, well, I am not exactly a frequent flyer, but when I flew back east from Boise for my Dad's funeral, I had bad experiences in both directions (admittedly only one due to the TSA). Going eastbound, I walked through the scanner with a sport vest on. I did not know that a vest was "outerwear" (I took off my winter coat and hat). And they did not ask me to remove it. They just got me on the other side, and escorted me into a glass enclosure where, in full view of all the other passengers filing by, a woman agent asked me to remove my vest and quite thoroughly patted me down (yes, right up the insides of my thighs). I was in tears, crying "You could have just ASKED me to remove it BEFORE I went through the scanner!" Little Old Lady on the way to a funeral? Doesn't matter to them!
On the return trip, I had a three-part ticket with two Delta legs and a Northwest Airlines leg in the middle. Delta and Northwest were in the process of combining when I made the reservation, and I was assured that when I returned (after the merger), the ticket would present no problem. Riiiight.... I stood aside from the line while the agent at the desk tried frantically to get everyone ELSE on the flight, while talking to tech help on the phone trying to get the computer to issue me a boarding pass. Then as soon as my plane took off with my empty seat, she said "OK, NOW I can re-book you!" Of course, my carefully planned get-to-Boise-in-time-to-drive-home-that-evening was out the window, as I flew to LaGuardia, Memphis, Salt Lake and then Boise. And made it 50 miles out of the 200 home from the airport before getting a motel so I could crash.
After that, I swore never to fly again, unless it was the ONLY way to get where I needed to go. That was the case last summer, when I flew to France and back. The only discomfort was physical due to the tiny seats. I'm a little person, and I was crammed in, so I wonder how large people can tolerate it at all (well, the guy next to me did it by taking up a third of my space). But at least I was not subjected to humiliation or severe inconvenience, so that seems to be the luck of the draw. Jis, you've been lucky, and by now you know the rules. I hope you don't get into a position where knowing the rules is not enough, or the system just happens to not favor you that day. As for me, I will take Amtrak over flying any day.