I think we havent realized yet that most of us don't really have original thoughts. Even in creative industries the amount of plagiarism (or so called inspiration) is at all times high (and that's before LLMs were available).
Every time I come up with an algorithm idea, or a system idea, I'm always checking who has done it before, and I always find significant prior art.
Even for really niche things.
I think my name Aeonik Chaos might be one of the only original, never before done things. And even that was just an extension of established linguistic rules.
An author that does nothing but "plagiarize" and regurgitate the ideas of others is incredibly valuable... if they exercise their human judgement and only regurgitate the most interesting and useful ideas, saving the rest of us the trouble of sifting through their sources.