Overstrained by Antinatalism?

It is often objected to antinatalism that its moral theory describes a morality which overstrains human moral capabilities and is, already for this reason alone, a questionable one. Instead of preaching antinatalism, it is argued, one does better to contribute to the actual improvement of the world. To this we retort: is “the improvement of the world” not a far more utopian undertaking than the mere resolution not, oneself, to procreate? And is it not fitting, if one is concerned about one’s progeny, to first bring the world into such a condition that they would feel comfortable in it?