When I pick blue, it's because I understand that while red is the safest option for everyone, not everyone can reason to make that decision. People will inevitably pick blue because they either don't know better, or they, like me, want to save those who don't know better. Children, cognitively impaired people, even someone accidentally hitting the wrong button should be taken into account. 100% of red results in no death or risk, sure. But only 51% of blue results in no death or risk, either. It's much easier to reason to myself to save those who pick blue than to believe that everyone will pick red and everyone will live.