We learn something about humanity based on the results of the poll. It's naive to think that 100% of people will press the red button. Some people will die if red wins. I think pressing red is selfish and violent, in that it can result in the death of human life by their own unwillingness to cooperate.

If we are not willing to work together in order to protect each other then I have a very pessimistic long-term view of our future. If every blue-presser dies, then our average cooperation level will only decrease, and the population will be over-saturated with defectors. I'd rather just go out now then deal the those consequences.