Yeah these findings remind me of a passage from the book "Talent Is Overrated". Thesis of the book is that world class talent is mostly due to hard work over innate ability. He supposes that one way that children develop drives in different directions is some identification of ability (even when it is not there really) in some domain leads adults to heap praise on them for that particular talent, causing a virtuous cycle of work and praise.

You can see this in parents who marvel at how great their children are at x, seems to be how kids are pushed. If kids are designed to be pushed to develop their skill sets by the dopamine inducing praise it could be that these drugs work because they tap into that pathway.