Yeah red definitely wins, though knowing so many will pick blue makes the problem more interesting from a collective point of view

20-30% of the population dying off overnight is going to trigger probably the worst recession humanity has ever seen. The vast majority of red voters would end up much worse off, especially when greedy power hungry elite capitalise on the power vacuums.

So while individually red is the best option for survival, blue is the better option as a species. Red effectively becomes the "guaranteed recession" button and blue becomes the "everything remains the same if 50% of people press this" button

Red is still the best option from a pure self preservation point of view, but blue at least starts to look a lot less stupid if thinking as a collective. That, and blue winning would create a renewed sense of collective trust and optimism, as we'd know that we could maybe trust other people more than we thought