AI does not learn and transform something like a human does.

But they do learn. How human-like that learning may be isn't relevant. A parrot learns to talk differently than a human does too, but African greys can still hold a conversation. Likewise, when an AI learns how to make art by studying what others have made, they may not do it in exactly the same way a human does it, but the products of the process are their own creations just as much as the creations of human artists that parrot other human artists' styles and techniques.