Yes that is true, but I don't think the people who use style transfer are actually passing it off as the original, they just like it for the aesthetic value of their own images. In other words, no one using the Van Gogh LoRA is actually trying to forge the Starry Night.
Given the value of an "authentic" painting of the Starry Night (or more realistically the value of something forged in, say, Samwise Didier's style) I can't agree with "no one".
I have to imagine that it's likely quite popular to sell AI generated art that mimics or copies existing works.
Do you use AI art generators? Flaws are extremely easily found out, it is only good for a rough snapshot (without much fiddling and even then, artifacts remain). I can guarantee you it is definitely not popular to sell existing works made with AI, you are better off hiring an actual forger. In fact, your suggestion is even the first I've even heard of such an idea.
