Part of the issue is that friends and partners, and other people trying to be supportive, often lie about how proficient someone's language skills are. I see it

Part of the issue is that friends and partners, and other people trying to be supportive, often lie about how proficient someone's language skills are. I see it on sites like this and reddit all the time, where commenters say things like "you're better than 99% of the people I talk to" when the poster, while mostly clear has made a lot of mistakes. It's probably a bigger issue for doctors and other professionals, because they are peppering their language with 'fancy' or 'big' words that superficially give them impression that their language stills are better than they actually are. It's one thing to be forgiving, it's another thing to lie to someone causing them to overestimate their skills and understandability.