The article directly addresses your exact point immediately after that example: "Readers can't be shown everything that happens to a character, or novels would

The article directly addresses your exact point immediately after that example: "Readers can't be shown everything that happens to a character, or novels would be 800 pages and cover 15 minutes in the protagonist's life. Sometimes adverbs help to move the story along through summary or time compression. But for young writers, learning to do without them is a good first practice."