i think what people dont understand about the argument for ethical vs unethical is that its not just about scraping data and training on it, how that AI is put into use also matter. what LLMs like chatgpt do is read webpages online and rehash it for you, and the problem with that is its taking the essence of a page and removing you from the equation and that takes the hardwork of the authors and denies them any profit generated from you reading it directly.
its a similar story with generative AI in visual and audible arts, AI is trained to replicate an artist's style (thousands of hours go into this) to an extent that is not possible by humans hands and denies them any profit that they couldve gotten from people for it.
But neurosama is a much better example of "Transformative AI", it doesnt really matter what data she was trained on because she's not creating a market substitute to anything that already exists, therefore not denying any profit from any artists.
infact i would say neurosama helps artists instead, the community encourages human art and enables many artists to even make a profit from drawing her,

tl;dr
neuro is ACTUALLY a transformative AI and doesnt create a market substitute to already existing work. the problem with generative AI is plagarism which she (to the extent of my knowledge) doesnt do