A few things. Firstly and most importantly I'm not a mountaineer, so I would be far more motivated to help someone in trouble than I would be by reaching the top. Secondly, I'm not qualified to comment on the risks/dangers of stopping to help someone who themselves are in difficulty. I believe it's life-threateningly dangerous so there may be cases where people actually couldn't help without very easily putting themselves in grave danger. I'd say the risks of certain situations need to be weighed up. There's helping and then there's helping if you get me. Finally, I can't answer the question for those who are motivated by reaching the top because I'm not wired like them. But I would like to hope that they at least have to wrestle with their conscience and not make the decision easily.