I can trivially torrent movies at home also. But then going out and selling them is widely accepted as being "wrong".

What does that matter? Generate as much as you want for your own personal reasons.

It's about actually being able to use that content legally (and commercially) that matters to most in this conversation.

AI training is a one-way operation - you can't reconstruct the dataset from a model/lora/ti. Unless it's something really blatant like real people, widely recognised copyrighted characters like Batman or Iron Man - it's going to be hard to prove that someone used your art to train an AI model. I'm not required to publish my model or the datasets that I used anywhere.