That does make sense, but I don't quite agree. To continue with your gifted-computer-engineer-from-the-1800s example, they aren't just good at computers-- they have the underlying skills (problem solving, attention to detail, able to apply abstract concepts to concrete objects, taking account of the whole system, good at maths, etc) and if they were born now, they also have an interest in computers. But if they were in the 1800s they would still have all those things (except for the interest in computers) and they'd be able to apply them to be good at other things