The social normalization of the SAT as a measure of intelligence is a very real thing. I should’ve prefaced my comments with to say that intelligence based on standardized tests is not an objective measure.
Then there are NO objective measures of intelligence. Nice deconstructionism.
They're measuring something, and the something is not just a random "whoops, I scored well by accident". For multiple choice, there is a chance of scoring well by accident, but taking more than one intelligence test would burst that particular bubble.