Extremely advantageous genetics are really hard to measure with current technology outside of fields such as sports. e.g. in strength sports, by the late teens

Extremely advantageous genetics are really hard to measure with current technology outside of fields such as sports. e.g. in strength sports, by the late teens it's really obvious who has it and who doesn't: some can effortlessly pull 3x a weight that's practically unobtainable for someone else of same weight category. Talent is real in sports, there's no reason why it wouldn't be in every other area of life. Talent is optional if you're going to be OK at something, but it's a basic prerequisite if you're going to be competing at world class. Things are a lot trickier with brains, since there's actually a lot more internal structural variability. Current scanning technology isn't accurate enough to tell us what the teenager (brain structures stop growing by this point) is going to be naturally good at, but that's not that far away given enough investment and the technology and enough data (basically other brains to compare to)