That's roughly what it argues further on in the article.
Dr. Hartshorne also points out that native speakers have exceptional precision. Even someone with 99 percent grammatical accuracy sounds foreign. He guesses that I have about 90 percent accuracy, which shouldn’t feel like failure. “Imagine if you decided you were going to pick up golf in your 30s, and you got to the point where you could keep up in a game with professional players. You’d think that’s actually really good. But for some reason, just being able to keep up in language feels not as impressive.”
Dr. Hartshorne also points out that native speakers have exceptional precision. Even someone with 99 percent grammatical accuracy sounds foreign. He guesses that I have about 90 percent accuracy, which shouldn’t feel like failure. “Imagine if you decided you were going to pick up golf in your 30s, and you got to the point where you could keep up in a game with professional players. You’d think that’s actually really good. But for some reason, just being able to keep up in language feels not as impressive.”