Isn’t there variation in language proficiency among native speakers?
Language ability varies to some extent even among native speakers.
However, for typical foreign language students,
being corrected by a native speaker is extremely helpful, as native speakers can point out the subtle nuances and original meaning of words and instinctively understand the essentials of the language.
Besides, it is better to learn not just from books and from lessons, but also learn common expressions by getting feedback from a native speaker.
