Pollyannaism leads most people to think that they and their (potential) children will be spared all this. And indeed there are some, although extremely few, who are lucky enough to avoid non-inevitable suffering. But everybody must experience at least some or other of the harms in the above catalogue of misery.

Even if there are some lives that are spared most of this suffering, and those lives are better than I have said they are, those (relatively) high-quality lives are exceedingly uncommon. A charmed life is so rare that for every one such life there are millions of wretched lives. Some know that their baby will be among the unfortunate. Nobody knows, however, that their baby will be one of the allegedly lucky few. Great suffering could await any person that is brought into existence. Even the most privileged people could give birth to a child that will suffer unbearably, be raped, assaulted, or be murdered brutally. The optimist surely bears the burden of justifying this procreational Russian roulette. Given that there are no real advantages over never existing for those who are brought into existence, it is hard to see how the significant risk of serious harm could be justified. If we count not only the unusually severe harms that anybody could endure, but also the quite routine ones of ordinary human life, then we find that matters are still worse for cheery procreators. It shows that they play Russian roulette with a fully loaded gun—aimed, of course, not at their own heads, but at those of their future offspring.

(via Better Never To Have Been: The Harm of Coming into Existence (2006 Oxford University Press USA))