It almost seems to me as if your entire argument is semantic. This puts a fine point on it:
Functionary Quotient: If you renamed IQ , from “Intelligent Quotient” to FQ “Functionary Quotient” or SQ “Salaryperson Quotient”, then some of the stuff will be true. It measures best the ability to be a good slave. “IQ” is good for @davidgraeber’s “BS jobs”.
IQ is also good for many non-BS jobs, considering how many non-BS jobs replicate the mental procedures that IQ tests, at a base level. Like, say, doctors. Or engineers.
It is a false comparison to claim that IQ “measures the hardware” rather than the software. It can measures some arbitrarily selected mental abilities (in a testing environment) believed to be useful.
If people stopped saying “I have a 140 IQ” and instead started saying “I have a 140 rating on a test that measures many of the mental abilities useful for doctors and engineers,” would that resolve the issue?
I don’t even know what my IQ is. I don’t think knowing that would really matter, because knowing it wouldn’t change who I am. But I bet it’s not low.