Even if they did, there's a possibility that AI being able to score high on IQ tests would demonstrate that IQ tests are of low validity. Research already show

Even if they did, there's a possibility that AI being able to score high on IQ tests would demonstrate that IQ tests are of low validity. Research already shows that people with conditions like ADHD frequently score lower on IQ tests but show normal intelligence when given tests that aren't so adversarial to working memory. A standard IQ test (WAIS, for instance) can make an ADHD brain seem a whole standard deviation lower than what is likely their actual intelligence. In the opposite direction, an AI might be able to pass visual and verbal tests with flying colors but totally fail to comprehend the world and adapt to new problems, or actually understand anything. Visual and verbal skills can to an extent measure intelligence but neither of those factors are strictly correlated to intelligence. The more that a processor becomes specialized, whether it's a human brain or ML on computer hardware, the more the test will measure their specialization and less their fluid intelligence. Don't get me wrong, I think this is all interesting, but AI may soon make it apparent the flaw of using IQ as anything other than a measure of mental fitness.