I mean, to be clear, making this call doesn’t require you to be incredibly altruistic here, it just requires you to care at all about trading with people around you, and acting at all with something like the principle of generalizability in mind (or TDT, or UDT, or whatever other flavor of game-theory that helps you describe principles that enable positive-sum trades and avoid negative sum equilibria).
I mean, to be clear, making this call doesn’t require you to be incredibly altruistic here, it just requires you to care at all about trading with people around you, and acting at all with something like the principle of generalizability in mind (or TDT, or UDT, or whatever other flavor of game-theory that helps you describe principles that enable positive-sum trades and avoid negative sum equilibria).