People conflate the carrying capacity of the economy with GDP, but these are different. The economy grows but requires fewer workers over time. As the carrying capacity decreases, the population decreases. On the ground, this manifests as the inability to afford child rearing.

The excerpt you cited assumes that this race of workers must afford to perpetuate itself in order to be viable. It cannot perpetuate itself, and it is not viable.

We fail at teaching a means with no end. Help them find an interesting end and they will achieve it by any means necessary.

Our job as parents is to expose our kids to a wide variety of disciplines so that they can find their interest.

I read that Elon Musk runs his private school this way. The kids narrow their focus quite early on. But of course there's tons of depth to study. So they actually get somewhere.