Taleb doesn't mean IQ doesn't test something real. He says this "something real" is irrelevant.
I'd much rather see the results of that for a potential job hire than I would want to see their SAT scores, IQ, etc.
The SAT isn't considered a proper IQ test.
Total SAT (math and verbal scores), divided by 10,were supposed to be close to the measured iq.
FWIW my SAT divided by 10 was within two points of my mother's IQ testing from decades before.