[samhain]

You're right, it's not a very good argument. It's just like someone saying that not having children is selfish. Both aren't very good arguments.

It would be better to use some other kind of metric, like overall happiness vs suffering, perhaps like antinatalism attempts to do. For example, someone who enjoys working all the time, might see that as a boon for their children, and so decide that overall, it's better to have kids. While someone who doesn't like work might decide to empathize with their unborn children and decide it would be a blessing not to have them. Very subjective, but more well grounded arguments for each persons' decision.