That phrase was used because it really is true.
IMHO, There is no human author. The story was written by AI software using the negatives exhibited by all the DEM candidates as source material. It was decided to name the author 'anonymous' because the DEMS are unable to think of anything original and saw how popular the Q-ANON thing was, so they copied it.
The statement this individual is quoted as writing goes like this: “He...has trouble synthesizing information.”
How can this be true?