In short: other posters want to hear from you, not from an AI. AI written posts aren't actually valuable (we can all dump stuff into the AI just fine). If you don't have much to say, it's fine to just share a link to the source you found.
Just link the article if you have nothing more to say. If you absolutely insist on posting AI-generated stuff be extremely clear that it is AI-generated instead of hiding that it has been ghostwritten by a LLM.