There are actually many, many skaters who are like this - my brother was the same way, skated goofy but could only pop tricks regular. So he could 180 and ollie regular but bombed hills goofy. This other guy is just one person like that who got good and used it to his advantage (I think there were actually a few well known ams/pros like that growing up who just didn’t exploit it and just came off as super good at switch, can’t remember any names at the moment though)