Entirely new works are often created entirely from samples, and can be amazing. See "Frontier Psychiatrist" by The Avalanches for one example done entirely by humans. There are many others.
Amazing or not, that is not the discussion. LLM output can look amazing as well but that's not what I'm arguing about.
Also with LLM's we'll reach a point when everything is made out of samples (metaphorically speaking), where do we fit original content then, or who will make it if it means it's going to be consumed by data centers immediately.