So, your point is that... because something exists and is important to niche users, it must not be true that it isn't used "a lot?" Huh?
You seem really hung up on absolutes. But I didn't use any. I didn't (and wouldn't) say that trains aren't used, I said we don't use them very much. And indeed, most things that were moved by train in the US in the past are now moved by trucks. If you ever visit the USA, I recommend you take a side trip through a few random, 30+ year old industrial parks. What you'll find is railroad crossing on the roads, but weeds on the unused tracks. Even places where the tracks are still used, they'll usually have weeds on the business access sections, because nobody cares. You'll find loading bays next to the tracks converted for loading trucks. Are there still trains? Yes, of course.
Outside of certain regional commuter routes, passenger trains are used as a luxury alternative to... buses. They do not often arrive more than 10% faster than a bus. And nobody cares, because if they were in a hurry, they would have flown.
"A couple of recent accidents" only tells you that trains exist. It tells you nothing about the relative number, or what is usually used for shipping.
And if you spent time on US roads, you'd quickly realize that there are a large number of oil tanker trucks. You can stand on the side of a major freeway and count them. On the west coast there are numerous places where there is only 1 major north-south freeway, and 1 major north-south railway, side by side. You can stand there and count oil cars. You'll see a few on the tracks; maybe even 1 train car for every 100 trucks. Presumably if you live right next to an oil distribution facility you'll see more rail cars than that. We have various petroleum distribution facilities in my town, because we're at a rail junction that connects to other regions. So they built them here, many years ago. But guess what? They removed all but 1 track of rail access! And that one has weeds. I don't think I've seen a train parked there for over 20 years. But if you have to drive in that neighborhood, you encounter a large number of oil and gas trucks. Someday they'll build a new facility... closer to the freeway! But for now they only lose 10 minutes by being stuck out by the railroad tracks, and they already have the storage tanks.
Oh, gosh, you saw a train on tee vee, they must be falling from the sky! Golly gee!
It should be noted that our electric light rail are almost all modern, except for BART in the Bay Area. (No faulting BART, they pioneered the field) Trains are well used... at the municipal level, for moving people short distances. We're not going to build expensive high speed crap for that. They're faster than driving, and have bike racks. They connect the `burbs.