In discussions on antinatalism, the following exchange of dialogue sometimes occurs:
Pronatalist: "Most people have a favourable view of their own lives. While some may have different views, the majority are still glad to have come into existence. On balance, procreation is thus acceptable."
Antinatalist: "Yes, but whenever one procreates, the risk that the created person suffers greatly in life and wishes they were never born is a risk whose consequences are born by another individual. While people are free to take risks with their own lives, creating another person is rolling the dice with someone else's life. The seriousness of the potential harms to those who come into existence makes that risk an unacceptable imposition."
There's nothing particularly wrong with this line of reasoning but there may be a subtle reason why it's unlikely to be successful (apart from the ordinary reasons). The counterargument engages with the idea that there's risk involved in procreation. This is true, of course, but the problem is that most people don't think in terms of probabilities. People typically don't think there's a realistic chance that bad things will happen to them - until those bad things actually happen to them.
It seems rather that the following is more appropriate:
Antinatalist: "Because of the widespread adoption of pronatalist ideals, many people will inevitably be created who hate their lives and wish they had never come into being, perhaps even wish to kill themselves. In some sense, the happiness of some is supported by the suffering of others. To justify procreation then is to justify the institution of inflicting suffering on some so that happiness may be experienced by other people in other places."
The above response is essentially equivalent to the former but it highlights the sheer sickness of the whole culture of procreation. It bypasses the matter of risk entirely by invoking considerations of actual harms and leaving abstractness aside. But who knows? Perhaps this counterargument will be equally unpersuasive. After all, it's easy to justify suffering when that suffering is not happening to you.