Being highly intelligent and strawmanning one's opponent are not mutually exclusive.
(My observations suggest a positive correlation.)
Could that be because you use the "strawman" label only for those incorrect depictions of opponent's possition that are above some minimum quality?
E.g. you wouldn't consider "they sold their souls to Devil" or "they hate our freedoms" or "they are just all stupid" or "they are simply evil" examples of the strawman fallacy, although technically they also do misrepresent the opponent. But for something to be worth the label "fallacy" it must include some minimum (albeit flawed) reasoning... and that is positively correlated with intelligence.
Related: The Blank Slate, The Psychological Diversity of Mankind, Admitting to Bias
"Hjernevask" a well known (in Norway at least) documentary series that I am sure will be interesting to rationalists here is now available with English subtitles online. Produced by Ole Martin Ihle and Harald Eia a Norwegian documentarian and comedian, it casts a light on both ways in which we know people to be different as well as the culture that is academia in the Nordic country and probably elsewhere as well.
The Series
The link go to the YouTube videos with English subtitles. Because linkrot sucks I'm providing another source for the videos.
Some Commentary
There was very little in the series that I found new and disagreed with some presentations. But this is not surprising given my eccentric interest in humans. (^_^) I found the interviews with the scientists and academics interesting and think that overall the series presents a good overview something well worth watching especially considering some of the debates I've seen taken place here recently. (;_;)
The latter wrote that in a 2010 article on the documentary series that I would also recommend reading. HT to iSteve where it is quoted in full.