Except that data says you're wrong. As a classic example, look at (1) the effects of adding iodine to salt and its impact on IQ, and (2) the withdrawal of leaded gasoline and it's impact on IQ.
And in general, IQ goes up as nutrition goes up (to a point). It's hard to be smart if you're calorie-reduced.
That said, is IQ important? To an extent, yes. In general a higher IQ means someone can hold more things in their head, which means they can handle more complexity.
Is it important? It depends. I would rather have a high-IQ doctor than a low-IQ doctor, for sure. I would rather have a high-IQ network engineer than a low-IQ network engineer.
And in general, IQ goes up as nutrition goes up (to a point). It's hard to be smart if you're calorie-reduced.
That said, is IQ important? To an extent, yes. In general a higher IQ means someone can hold more things in their head, which means they can handle more complexity.
Is it important? It depends. I would rather have a high-IQ doctor than a low-IQ doctor, for sure. I would rather have a high-IQ network engineer than a low-IQ network engineer.