so inserting your opinion that it cant happen is valid? either provide a base for this or stfu about opinion being vlaid or not. you dont need time travel, the fact that the hypothetical exits means the question exist which means that an answer exists. just because the answer is real and the implications thereof disagree with your position does not negate the reality of a potential scenario that requires an answer that opposes yours. the point of saving the young vs old hypothetical is to demonstrate that it is possible to quantify the relative value of lives. if it is possible to do so, then there exist scenarios histroical or hypothetical where the benefit of taking a life is greater than the cost of doing so or taking a different life.

historical example since you hate the concept of hypotheticals so much: killing the Romanov children. killing those kids was objectively good because it removed the possiblity of the restoration of the dynasty and severely handicapped movements based around doing so since they are no more of them to put on the throne.