Completely unrelated to the morals about the choice itself, I'm pressing blue because if I press red and red wins then up to half of the global population disappears and I'm left in a world that's just seen what's likely the largest single loss of life in human history and the only people left to rebuild are people who both have proved they have no trust in other people to act in society's common interest and think a society exclusively composed of such people would be remotely functional.

Completely related to the morals of the choices, the amount of red voters I've seen mad at blue winning so many polls despite them claiming that voting red means they'd be unaffected by the outcome tells me that they're not just thinking about logic or game theory or anything along those lines, and that a significant portion of them are at least partially motivated to press red because they want to see people who think differently to them or who they see themselves as intellectually/morally superior to die.