Your anecdote contradicts the study discussed in that article. Given the nature of your argument, this sounds like a great time to exit this exchange.
He was just describing his experience which indeed only a sliver of people knows about, because it’s a very high IQ situation. The study you linked is just one study and cannot be said to encapsulate everyone’s experiences. I can confirm from my own experience that his experience is very possible.
Don't get me wrong other intelligent people are on board with me during these episodes, and they are sometimes able to present their specific concern with the solution and that is valuable. I've been wrong before of course. On the other hand the "think of all the complexities" crowd just spout nuggets of wisdom like that until they are able to comprehend the solution, and that takes about 15 minutes in my experience.