Clearly a trucker does not "deliver goods" and a Taxi Driver is not in the business of ferrying passengers - the vehicle does all of that, right?
Writers these days rarely bother with the actual act of writing now that we have typing.
I've rarely heard a musician, but I've heard lots of CDs and they're really quite good - much cheaper than musicians, too.
Is my camera an artist, or is it just plagiarizing the landscape and architecture?
The distinction I pointed out, applied to people producing writing intended for other people to read, seems to give a really clear "line". Syntactic tools, you're still fully producing the writing, semantic tools, you're not. You can find some small amount of blurriness if you really want, like does using a thesaurus count as semantic, but it seems disingenuous to pretend that has even close to the same impact on the authorship of the piece as using AI.