I think this article might miss some of what people are saying. I’m pretty dang smart. I am just like this person, I go deep into topics and learn about them and am an expert at very specific things. But the speed at which you learn, and the speed at which you can recall those things, and the speed at which you can then utilize those things without making mistakes is what differentiates us.
I’m sure this person that wrote the article is smarter than me. It doesn’t mean I couldn’t accomplish the same things they do, it would just take longer, take more concentration, and have many more errors along the way.