That's not true, or is at least making GPT3 out to sound more trivial than it is. I've spent hours "interviewing" people about dragon sightings in Washington D.C., or Elon Musk about a fictional startup, or similar. I've had it generate startup ideas that are definitely original and elaborate on them, including company names that are concatenations of words that have never been used as a proper noun. I had it generate an interview with the founder of a fictional 1980s video game company, and it went into detail about the series of fictional games. It was all plausible, but the names were unique strings that I could not find on Google.