And yet the artist's name is used to push the weights towards pictures in their style.
That's not even vaguely new in the world of art.
Imitating style is the core of what art is. It's absolutely unconditionally protected by copyright law. It's not even a .01 out of 10 on the scale of unethical. It's what's supposed to happen.
The law might not cover this yet, but any law that restricts the fundamental right to build off of the ideas of others that are the core of the entirety of human civilization is unadulterated evil. There is no part of that that could possibly be acceptable to own.