The difference being that a musician being influenced by other musicians still has to work to develop the skills necessary to distill those influences into a final product, and colors that output with their own subjective experiences and taste. This feels like a conveniently naive interpretation to justify stealing artists' work and using it to create derivative generative slop. The final line in your comment is pretty telling of how seriously you take this issue (which is near-universally decried by artists) -- some other massive company is doing a bad thing, so why shouldn't I?

edit: I have to add how disingenuous I find calling out corporations owning "all of humanity's musical knowledge and history" as if generative AI music trained on unlicensed work from artists is somehow a moral good. At least the contracts artists make with these corporations are consensual and have the potential to yield the artist some benefit which is more than you can say for these gen-AI music apps.