Painting (portraits for example) as a profession largely disappeared, while art based on painting evolved (impressionism, cubism, etc) due to the camera.

My point is that photography is essentially a simulacra of reality, yet it unexpectedly created its own art form and influenced existing ones. So will the use of LLMs for generation

They're conflating the LLM to advancement by comparing LLM:Camera, when really cameras and paintings are two different things