Obligatory: I'm anti-AI, mostly anti-technology

That said, I can't say that I mind LLMs using copyrighted materials that it accesses legally/appropriately (lots of copyrighted content may be freely available to some extent, like news articles or song lyrics)

I'm open to arguments correcting me. I'd prefer to have another reason to be against this technology, not arguing on the side of frauds like Sam Altman. Here's my take:

All content created by humans follows consumption of other content. If I read lots of Vonnegut, I should be able to churn out prose that roughly (or precisely) includes his idiosyncrasies as a writer. We read more than one author; we read dozens or hundreds over our lifetimes. Likewise musicians, film directors, etc etc.

If an LLM consumes the same copyrighted content and learns how to copy its various characteristics, how is it meaningfully different from me doing it and becoming a successful writer?