What?
I couldn't believe this statement. It completely neglects the massive differences that exist between people of any intelligence in terms of what and how they think. I'm talking about things like educational level, ideological biases, epistemological approaches to thinking, etc. It also completely neglects the honesty and integrity of the person you are emulating.
To give just one example: I've found that most of the "conspiracy nuts" I've met (people who think we didn't go to the Moon, etc.) are highly intelligent, probably pretty far above average. If anything being highly intelligent makes it much easier to rationalize a ridiculous belief system. Any idiot can imagine a round Earth that spins and orbits the sun but it takes someone with very high intelligence to understand ether vortex theory. Judging by the intricacies of their speculations the "bakers" who assemble bizarre far-fetched conspiracy theories out of QAnon's cold reading act are also quite intelligent.
Con artists also tend to be highly intelligent, hence my comment about honesty and integrity.
For some odd reason it seems like a whole lot of very bright people have adopted this weird kind of biological determinist hard materialist view of cognition and its quality. By materialist I mean it reminds me of Marxist dialectical materialism: the idea that the state of society is a pure function of its technology and other capital. A bunch of people think you can measure someone's IQ and that will tell you how correct their opinions are. Smart people have better opinions because they can think more faster, or something.
I struggle to understand how anyone could possibly believe this. It's patently absurd. It's roughly analogous to saying you can tell the quality of a driver by the performance of the vehicle they are driving, or that the correctness of a computer's output is a pure function of processor speed irrespective of what software it's running.