I worked at IDEO for a few years. None of the brainstorms I've ran, or taken part in, ended with a, "eureka, that's it!" type of moment. And coming up with the 'solution' was never the point. It was about doing something generative, creative, and fun together. It was about engaging folks and collaborating in a different way than they might be used to. I'd also start by offering a few very poorly drawn, completely non…
I was a Disney Imagineer (they have their own braingstorming concept, which has psychological safety built in). This person's article is indeed missing the point, or at least arguing with a straw man. I would encourage folks to check out the Walt Disney method. It's not hard to get right, and (in my experience) it works well.
Was being a Disney Imagineer as awesome as it sounds, haha!