[mwsfc]

I would venture a guess the logic in some of these cases has a healthy does of practical wisdom baked in. On sailing vessels they are/were? chaotic, violent, noisy, and the crew perhaps wasn't the most experienced/educated(?) so keeping things simple with fixed names was perhaps the optimal safety solution in that environment. In the medical profession it's about the Hippocratic Oath (I am not a doctor), an operating room is more controlled, and everyone (is usually) well trained, so maybe in that environment it makes more sense to make a rule that the perspective should always be the patients? Thinking out loud here more than anything...