They don't have to. This particular train explodes on its own if it drop below 100 mph.
Even tepid regulation will destroy the "our TIA is the entire observable universe due to the potential of self replicating AI probes so we totally deserve 10 trillion dollars in investor capital" trade
I've seen this movie. I think it was called "The Bus That Couldn't Slow Down". It had Keanu Reaves and Sandra Bullock. IIRC it didn't end well for the bus.