I love this thought experiment.

If you pick red you survive.

If you pick blue and at least 50% of people picked blue, you survive, otherwise you die.

There's 0 advantage to picking blue, none what so ever, the only reason you'd pick blue is because you assume there's some subset of people that is so unbelievably stupid that they'll pick blue. You're sacrificing yourself in the hope of saving them.

IMO, the reality is that everyone you think would pick blue would actually pick red. Very few people are that stupid, and even if they are they probably also have access to someone not as stupid who will tell them to press red.

The only people you'd be saving are other suicidal white knights that pick blue to save those imaginary "blue pressers", and the outcome of that, since that blue pressing base doesn't actually exist, is that you're all just committing collective suicide for absolutely no reason.

What "blue pressers vs red pressers" says about our society is best left to philosophers.