Really? But I stand to be corrected if I'm wrong. So how about bloggers who pay content writers on Fiverr to write a full blog post to be posted on their news blog. Will you consider that as plagiarism? Because they actually didn't write the content, but rather paid someone to do that for them?? (i.e following your definition of plagiarism)
The writer is not the primary concern here, the content is. It makes no difference if the owner plagiarizes content or whoever works for them does.
If I have a site and you write for me, I don't need to tell the world that I employed you to write the text. I can post it in my own name or have an editor do it. Copywriters even sign contracts stating the content belongs to the site. If the text you/me/the editor wrote is plagiarized, it becomes a problem. And again, the world is not going to care if I wrote it, I asked you to do it, or one of my neighbors did.
But I think for the fact that I had no source and can't be found anywhere on the web online is a reason it ought to have been non plagiarized content, because I'm kind of curious to have someone break this down.
AI bots don't come up with their own content. They have a library of information they can refer to and pick what you asked them. A bot is a search engine writing content that has already been written somewhere before. It can't do things that have not already been done. Or in this case written. It can come up with variations, but based on some originals it has in its memory.
You don't have to post an actual link to an article you copied/paraphrased from. Naming the service is the next best thing. Source: Google, Chat GPT, Twitter, YouTube Live. No one can accuse of plagiarizing if you do that. Always post a link if you can, but since we are talking about bots here, it's not possible.