Are Freight Trains fitted with a ''Blackbox'' type of device or in-cab recording CCTV?
Yes they are.
I'm comparing the situation as a ''White Van Drivers'' can to be professional drivers it's that when fewer eyes are around chances of getting caught are less.
It’s a ridiculous comparison which sheds absolutely no light on anything. Driving trains has nothing in common with driving road vehicles, other than the speedometer being in mph.