Yes, that was my slightly horrified thought, in between all of the amusement.

But I took speech therapy as a kid. I had, by my estimation, one good teacher and a string of mediocre to bad ones. (The good one is the one who sat down and took the time to explain to me how to form each problematic sound. She had diagrams! The others had no advice other than to talk slower.) Writing doesn't seem to be necessary to that job, thankfully, and many people who can't form a complete sentence when writing are perfectly fluent speakers. (Why they can't just write like they speak, though, I don't understand.)