This shows the power of IQ. Having a sufficiently high IQ means you can become a world-class master at a hard subject quickly, easily surpassing others who have decades of experience. It's the ultimate cheat code or power-up in life, second to have rich and well-connected parents, I suppose. Freddie Deboer is right that parents consider IQ to be very important, as much as society may try to downplay its importance or predictive value.