IQ is undoubtedly overemphasized by some factions, especially those with an axe to grind and a dog whistle to blow, if it helps them feel less guilty about their position in the world or otherwise rationalizes injustice.
OTOH there's definitely a difference between people, people who aren't mentally defective, people that are quick on the uptake, sharp and alert, who adapt to new mental models. IQ might be an unscientific metric for identifying these people, it might leave some of them unidentified, but they definitely exist. Anyone who's worked with other people, hired other people, had to evaluate other people's capabilities, can be in no doubt about this.
It's hard to separate out Taleb's own axe-grinding from anything concrete he's trying to say about what IQ means as an independent concept. He seems more upset at short-sighted application of thought to first-order problems rather than asking higher-order questions about why the problems are problems in the first place, why the questions are being asked. When I've seen a difference between people in this degree, it's more a matter of personality than intelligence: the more detail-oriented, autistic-spectrum someone is, the more they focus only on the details, and miss out on the bigger picture. It takes a little effort to step back, but I think it can be learned. Whereas IQ (or g) doesn't seem to be improved easily with learning.
OTOH there's definitely a difference between people, people who aren't mentally defective, people that are quick on the uptake, sharp and alert, who adapt to new mental models. IQ might be an unscientific metric for identifying these people, it might leave some of them unidentified, but they definitely exist. Anyone who's worked with other people, hired other people, had to evaluate other people's capabilities, can be in no doubt about this.
It's hard to separate out Taleb's own axe-grinding from anything concrete he's trying to say about what IQ means as an independent concept. He seems more upset at short-sighted application of thought to first-order problems rather than asking higher-order questions about why the problems are problems in the first place, why the questions are being asked. When I've seen a difference between people in this degree, it's more a matter of personality than intelligence: the more detail-oriented, autistic-spectrum someone is, the more they focus only on the details, and miss out on the bigger picture. It takes a little effort to step back, but I think it can be learned. Whereas IQ (or g) doesn't seem to be improved easily with learning.