This article is written so polemically it's hard to take it seriously. Also Taleb seems to be constructing so many straw men I wouldn't even know where to start.
IQ isn't a swindle, it's a very real thing. However, it is only one factor among many in determining most practical real-world outcomes, and it is well-known to be affected by environmental variables at population levels.
But IQ isn't a "fraud" or "immoral". These are bizarre claims Taleb makes, with zero evidence or even definition of what he means.
What a strange article.