I've had my writings directly plagiarized by other people--people who made word-for-word copies of my work, replaced my name with their own, and made a tidy profit on it. They profit more than I ever managed, because they have more resources. In the aftermath, my writings are still "there", not "stolen" in the physical world sense, but my ability to make a living is damaged, and the plagiarism is deeply unethical.
LLMs and "AI" are just one small step removed from straight-up plagiarism. They are massive moral injury[1] machines.
[1] https://moralinjuryproject.syr.edu/about-moral-injury/