Particle effects are not the art. The story is. The performance is. There are far more people than you think who desire to see this expression from people like them.That nonsense was penned by someone who doesn't know a back-propagating RNN from a Christmas ham. ALL machine learning models are trained on some form of input content ... it's literally why it's called machine "learning" Nor is this training "stealing", no more than a human artist steals when they begin learning their craft by studying the works of past masters.
To you. That's what you are failing to see.In theory. Not in practice ... but at some future point, sure. Again: so what? If the result is as good as human content, that's all that matters.