We shouldn't hold individual humans and ML models to the same standards, because ML models themselves are products capable of mass production and individual humans are not even remotely at the same scale.
If you write that book, chances are you will gain some fans that are also fans of other authors in that genre.
If ML models write that genre, they can flood that genre so full that human artists won't be able to complete.
If you write that book, chances are you will gain some fans that are also fans of other authors in that genre.
If ML models write that genre, they can flood that genre so full that human artists won't be able to complete.
It's not even a remotely equivalent scenario