Should be clear that, when faced with a power capable of doing this, humanity should cooperate to entirely choose red.

Becomes more interesting if, whatever the outcome, choosing red somehow removes the ability to perform manual labor.

I don't get how so many people say pressing red is the right choice. Yes, if everyone presses red then nobody dies, but the same is true if everyone presses blue. But if almost everyone presses red, a lot of people die, and if almost everyone presses blue still nothing happens.

It would be funny if nobody dies but this was just a test if you are capable of large scale coordination - and everybody who presses red just looses their vote in society.