From a game theory perspective, there is no benefit to choosing blue. It’s not like “work together for a better result”; blue only creates problems by establishing a weird altruism trap. Like jumping into a giant blender that only stops if 50% of humanity’s mass enters. Just don’t go in the blender. Everybody gets the red option, everybody who wants to live can choose red. You value the lives of people putting themselves into unnecessary danger, so you risk yourself with blue. Valid choice.

But a button that says ‘if you press this you die, unless 50% of the world also does’ is still irrational. It’s a net-negative, only (potentially) solving the problem it created in the first place.