Not sure it would necessarily be "wrong" for the human race to cease to exist if everyone in the human race didn't want to procreate. But also remember that th

Not sure it would necessarily be "wrong" for the human race to cease to exist if everyone in the human race didn't want to procreate. But also remember that this is about human choices, not forced realities. The thought experiment is about what happens if everyone chooses to act in a certain way, not if everyone is a literal copy/paste automaton. To illustrate, even if everyone decided they didn't want kids, assuredly thousands/millions would still have "whoopsie" babies. With regards to choosing to have three kids: overpopulation, famine, and destruction of Earth are not a given. Firstly (and again) because nowhere close to everyone on Earth is actually able to have three kids for a variety of reasons, and secondly because even if you did have exponential population growth you can avoid those things, mostly by colonizing space / building vertically / Dyson Sphere / etc. Unlikely but not a given so therefore hard to argue its necessarily bad.