Same as with the original dilemma. Most people are not sociopaths and will choose to cooperate with empathy for everyone else. That's just how species survive and adapt. (1) Alternatively, some people believe that sustained cooperation is in itself a sustained equilibrium. (2)

Most of the world is not as individualistic as Silicon Valley engineers believe in their own ivory towers after decades of reading Ayn Rand.

(1) https://en.wikipedia.org/wiki/Mutual_Aid:_A_Factor_of_Evolut...

(2) https://www.optimallyirrational.com/p/the-true-story-of-the-...