That's the optimistic version, which focuses mostly on things where reciprocity can even be possible. The last example is a hint at what the depressing* version looks like.
If you're in a situation where you seem to be surrounded by DefectBots, the problem is not that you are not defecting enough. The problem is to get the hell out of that situation.
P/S/A: There are single sentences which can create life-changing amounts of difference.