As somebody who has done AI for a very long time this is scary and not being paranoid. Let me explain, and I will use a programming example.
Imagine I am writing code, and there is some AI that follows me. I write a loop, and some conditions, and the AI learns about those loops and conditions. Then the AI in some other context creates a loop and a condition, but entirely different, is it copying me?
The simplistic argument is no it is not. I argue yes it is because of a major difference in how we and AI learn. Even though that new loop and condition can be written by myself I don't actually copy, even if it is similar or copy and pasted. I learned how to program using the basic steps of the programming language. Meaning I learned what loops are, I learned what conditions are. I learned how to apply each of them. The AI on the other hand only learned my end result. Meaning if I was to tell the AI that a loop is a condition and vice versa then the AI would follow that, even though I would not be fooled.
And therein lies the problem, the AI is not learning, it is a grand scheme copying machine hidden in supposedly learning abilities. And yes that is wrong and infringes on copyright.
In the context of the artist it is extremely scary because the end result is the only thing the AI learns. It does not understand how to apply strokes, it just sees a stroke and copies it. Meaning if somebody did X technique of doing a stroke, then the AI will copy it and use it for something else.