I was just making a point. I suspect that some of our members believe that only native speakers can speak the language well.
In fact, while not many (as a percentage of all learners) reach the stage where that can be mistaken for native speakers, an impressive number do reach a stage where they speak more clearly and effectively than many native speakers. And, as we see in this forum, some non-native speakers demonstrate a real understanding of the workings of the language and an ability to explain problems effectvely.
(Sorry. I got a bit side-tracked there on one of my hobby horses.)