I absolutely know much on the topic. Please read my comments elsewhere in this thread for a strong break down of the issues and how AI actually works. Btw, the source of my authority on all of it is having a Master's degree in art, working in a professional art field, having a BS in Applied Mathematics, and building AI's as a hobby. I live in literally every aspect of this debate.

TL:DR - AI models are never trained directly on source material. Sources are fed into statistical analysis algorithms that utterly destroy the sources and derive info that computers can understand in a process called Vectorization. The AI is then trained on those vectors. Then, when a prompt is given, the algorithm takes it apart as an input in a process called Tokenization. From the input, in an algorithm that goes beyond the scope of this, an output is given that statistically satisfies the model. So even in the usage process, the AI never actually directly works on human inputs.