You're putting words into that poster's mouth as you shift the goalpost, but an IQ of 20-34 isn't especially common as IQ is not distributed uniformly. You might have a hard time being informed with a 34 IQ but that applies to all matters. IQ isn't designed to assess political competence nor even one's ability to be informed. Politically it's pretty irrelevant.
https://paulcooijmans.com/intelligence/iq_ranges.html