The end of the article mentions it. Some people are not purely rational decision makers, some people are altruists who know others are not purely rational, etc.
By choosing red you will kill some people.
By choosing red you will kill some people.
Blue is purely a win-win for me, so it's rational to only choose blue. Reds have their own value judgement.
"Rationality" is a useless quality to debate here.
Dying is a win for you?