[AlphaWice]

This is a shaky argument, because you dont bring iteration into the picture. This is sort of like prisoners dillema. Play prisoner's dillema once, and everyone opts to "tattle." Play an iterated-version of prisoners dillema, and suddenly everyone is alot nicer.

The key is control. If you are the only one choosing, of course you should choose "death ray." But the choices become nicer when more people than yourself have the power.