Not quite right. While AI uses existing images to learn patterns, styles, composition, etc., it does not typically "copy and paste" them. Instead, it creates an entirely new images based on the probabilistic patterns it learned from the training data. Using your violin example, if I tell AI to create Vivaldi's Four Seasons, then yes you would be correct, but if I told AI to compose "a violin concerto to celebrate the passing of the seasons, with emphasis on changing tempos, and a more modern blending of traditional techniques with electronic, pop, and rock styles", then it would be just as original, as if a young violinist after hearing the works of numerous composers, set his own composition to music on the violin. In photography are the poses you use or the lighting setups, strictly your own inspirations or did you compile them from ideas you gleaned from someone else? When tone mapping an image, did you just come up with a color scheme all on your own, or was it the result of viewing what others have done? Humans have been "copying" the work of others (if not exactly then as a basis for another idea) long before AI came on the scene.
AI is still in it's infancy, and as such there are still bridges to cross, especially as regards protections under the copyright laws.