I don’t know what’s your point? By that metric human population got too high and over natural carrying capacity, when humans moved from hunter gathering to primitive agriculture.

Humans are not reliant on nature’s given carrying capacity since humanity has always created it’s own environment and has adapted, engineered and invented itself out of multiple unsustainable ecological collapses through the advancements in the quality of means of production.

And btw while I think it’s shitty project to plan to increase teen pregnancies… Still, fuck anti-natalism and degrowth if that’s your point.