yes, just as IQ tells you close to nothing about the properties of human intelligence! (only how good you are at taking IQ tests).

Consider this - what does being smart even mean? Does it mean you're able to solve logic puzzles fast? Does it mean having a good memory? Does it mean being able to make good decisions? maybe it means being able to resolve interpersonal conflicts? or maybe being able to cook something amazing from scratch without a recepie?

IQ seems to be seen as some vague concept of the computational power of the brain, but only when it comes to logic puzzles and remembering things. What if someone's brain's computational power instead favours considering the interactions of various flavours to create outstanding dishes? or moving their body to dance the most mesmerising dances?

imagine you're a scientist though! a man of science, logic and reason, living roughly at the same time IQ was standardised. And you are smart, all your friends think you're smart - so you set the scale of the entirety of human intelligence to be measured with logic puzzles. Nothing else. All the other stuff is just some talent someone has...

but what if someone is talented at solving IQ tests? Does that mean they're smart? if there is no discernible difference between someone who's talented at solving logic puzzles, and someone who an IQ tests deems to be intelligent, does that mean only those who enjoy logic puzzles, and therefore have gotten a lot of practice in solving them, are smart?

another question - is it "cheating" if somebody trains for their IQ test? if someone trains their mind specifically to be better at them - will that person become more intelligent, or just more skilled at filling out IQ tests well? how can you spot a "cheater" like that?

where even is intelligence in the brain? where does it come from? your genetics? your upbringing? your environment? everything at once?

how do you measure something you can barely define? and why with logic puzzles? why not an interpretative dance to the sounds of noise jazz? why not the baking of a pavlova cake? or maybe a rap battle?

apologies for the long rant. IQ is not a scientific measurement, it's a measurement of how likely you're to do well on logic puzzles. and whoever popularised it and made it seem like the way to prove you're better than others infuriates me. the above are my personal, more or less subjective, issues with the idea of IQ, i do recommend this video essay to understand how deeply flawed even the history of IQ is. There's piles and piles of arguments against IQ, and very few in favour