Who ever said this accident had anything to do with PTC?

This was a failure to properly relieve someone who had expired on hours of service and was not supposed to perform any further duties, and have that relief properly secure the train. That isn't about train authority or control, so it has nothing to do with PTC. And, as far as I know, you just maybe the very first "politician" I've actually heard claiming that?

PTC, is about redundant command and control to assure proper and safe train operation, authority, speed compliance, train control. PTC is designed so choo choo's aren't passing red signals, or running through mainlines switches lined against them, and smashing into the other oncoming choo-choo's, like at Chatsworth, or heading into 60 mph curves at 110 mph. like in NY and Philly, or failing to adjust speed for the indicated route into a station and crashing through the station, like happened in Jersey. We could have done is cheaper, we probably should have done it with less proprietary architectures, and woulda, if we had chosen a different process. But, what it won't do is send out relief to properly tie down the train, like started the chain of events here.

And, no one really knows what the fire crew did or didn't do, because there are parts of that narrative have some conflicts or blanks.

And, what exactly did those evil "gubmint" "politicians" and industry wide self regulation did come from this disaster, and a couple of other similar but less tragic fracking oil fires, from other causes teach us, things like new car design, and probably most important fracking oil degassing requirements, prior to shipping, reducing explosive nature of these oils, and we are all lots safer for that. This stuff was so full of CO2 and NG that it was like a soda can full of gasoline, which you just shook up, which everybody had avoided dealing with until this became too big to ignore.