I was being hyperbolic; I thought that would be obvious.

not nearly as easily or quickly as they can move staffing agencies in the current climate

You and I must work in very different current climates.

You didn't personally experience that anecdote (and it's also just an anecdote). Show me a NURSING union that protects people who are dangers to that level. We don't because it's not our professional culture, so it's not how we run our unions. The president of the Massachusetts Nurses Association is still a practicing nurse. She has no personal or professional interest in protecting nurses who are genuinely dangerous.

I also have 20 years experience in management prior to becoming a nurse, including quality, safety and accident investigation experience. One accident doesn't prove that an employee is bad, no matter how much damage it cost. Systemic errors exist. Was that guy being impatient because management was on his ass to do more and more with less and less support? Holding him to an impossible schedule like they do the rail workers? How was he able to have his truck in a situation like that in the first place? Did he bypass safety signalling/communication, or did the signaling/communication policies not exist in the first place? If that driver was genuinely a dangerous employee and had no prior disciplinary action, then that's a management failure to document concerning actions in the past. None of that has anything to do with the union and the union was right to stick to the letter of the contract.

And policing needs to be reformed top to bottom. Union protection alone is not sufficient to create the culture of abusive power that exists in modern policing. That requires the full complicity of our legislative and judicial branches. (See: "tough on crime" politicians and SCOTUS shielding cops from accountability and responsibility.)