A key point is the date, 2016. This was 7 years ago. Just because there were issues then doesn't mean there are issues now:
"In late 2016, Stephanie Griffin, a former Union Pacific carman, went to her manager with concerns that she was getting pushback for tagging – or reporting for repair – railcars. Her manager told her it was OK to skip inspections."
Its gotten worse. The industry has been greatly increasing workload on fewer employees.
Just a few months ago Biden forced a contract on rail workers who were complaining, among other things, how they're stretched thin to an unsafe amount.
Most of Congress backed the administration and rail companies
"In late 2016, Stephanie Griffin, a former Union Pacific carman, went to her manager with concerns that she was getting pushback for tagging – or reporting for repair – railcars. Her manager told her it was OK to skip inspections."