AI can help someone bring their musical ideas to fruition, draw pictures, or write stories.
There is still creative direction from a human - and now, rather than having to be a highly skilled human, it can now be almost anyone. In a way, AI brings creativity to the masses who aren't lucky enough to have the time to hone skills that would take thousands of hours to learn any other way.
As a former professional musician, let me tell you: the skills are not the problem here. People don't not make art because they don't have the skills. They don't make art because they have nothing to say, nothing to express.
The skills are a byproduct of having a worldview, a perspective. And unfortunately (or perhaps fortunately) AI can't help anyone with that.
Iterating to get the right output from a prompt- and waiting for the output to be generated - is not an instantaneous endeavor. How much improvement could someone see if they dedicated that time to drawing or writing practice instead?
Developing a "voice" is done, at least partially, via honing one's craft, as well as engaging with art made by other people and cultures. The former is antithetical to prompting, and the latter is actively being destroyed by AI.
I can't help but feel that this strange insistence by industry that AI be used to all but usurp art ultimately comes from a place of jealousy, and/or due to the fact that some intelligent-to-Americans-sounding British voice saying something like "we're operating at the intersection of art and technology..." at some TedX talk causes VCs to turn out their wallets.
No, it is because replacing art is easier than replacing other jobs, that is the only reason. If they could they would replace something way more lucrative to them, but as is replacing artists is the thing they can do so that is what they do.