[_8j50]

Please read the caveat section on that page:

"Some have gone further, and used height as an example in order to argue that "even highly heritable traits can be strongly manipulated by the environment, so heritability has little if anything to do with controllability.""

Regardless of this, this is a measure if IQ, they control for a similar environment but they don't control for similar upbringing and individual's interests and pursuits.

IQ isn't static, there maybe a static ceiling that differs between individuals but the choices made by parents,individuals and environment affect how much developmental effort is focused on specific IQ traits.

As Einstein put it,you shouldn't measure a fish on it's ability to climb a tree.