IQ tests intentionally omit any questions related to empathy, emotional intelligence and creativity, so it can favour people from the top of the pile and act as accurate perdictor of success in ruthless capitalist society. It implicitly promotes lack of those traits in individuals and explicitly promotes the definition of intelligence that’s unrelated to them. While you don’t get lower scores if you’re highly creative or empathetic person, so it’s not directly a detrimental for society and can be a useful metric for some cases like specific jobs, it’s image as sole measure of intelect is manufactured to promote “specific kind of people”, to which group many republican businessmen would belong.
I’m not disagreeing with what you said, just thought I’d expand on that.
Comrade Putin thanks you for your contribution, we will do as you suggest and make people illegal.