The studies are generally very careful to frame their conclusions narrowly, as pointing out empirically measured differences in particular populations, not showing that something is a "deep-seated need" of boys or that they are "born tinkerers". People doing those studies are usually agnostic on whether the cause is biological, due to parenting, due to other aspects of social environment, etc.

The stronger interpretations, like in this article, tend to come from pop-science commentators.