AIs aren’t people. What we have is people using an algorithm to rip off artists and defending it by claiming that the algorithm is like a person learning from its experiences.
If I wrote a program that chose an image at random from 1000 base images, you’d agree that the program doesn’t create anything new. If I added some random color changes, it would still be derivative. Every incremental change I make to the program to make it more sophisticated leaves its outputs just as derivative as before the change.