Earlier quoted context omitted.
I don't understand why you're presupposing "performance" as a measure of intelligence, and what you mean by it. No one is saying that intelligence alone (above a threshold) equates to demonstrated, or even potential, life outcomes.
then your definitions are circular, "intelligence is whatever the IQ test measures, assuming it measures anything" this is no way to establish validity or reliability. you need an independent theory of intelligence and a variety of indepenent objective measures -- otherwise the whole enterprise is circular
> you need an independent theory of intelligence
Sure. We have some of these. Despite it's flaws and limitations I'm partial to portions of Guilford's Structure of Intellect.
> and a variety of indepenent objective measures
The various sub-tests in an IQ test are nominally independent, yes? Going back to your "CEOs", I don't see how a social position can be assumed to be objective when it is subjectively contingent on external social processes.