Which is not illegal to do. It becomes illegal if you directly use or reference the material in your product. Consuming copyrighted material personally is fully legal, training a model on that same copy-righted material is illegal. Where is the contention?
>Consuming copyrighted material personally is fully legal, training a model on that same copy-righted material is illegal. Where is the contention?
The contention is obvious in your statement. Is it illegal to train a model, and why? Why is it legal to train a human on copyright material and then sell those skills, vs training a computer and selling the skills?
A human who trains their brain on material they don't own then creates art or writes code based on this training, sells the product too.