A lot of communication isn't about "established facts/research"; it's about someone's experience. For example, if a human writes about their experience of using a product, perhaps a drug, or writes what they think about a book or a film, then I might be interested in reading that. When they write using their own words I get some insight into how they think and what sort of person they are. I have very little interest in reading an AI-generated text with similar "content".