This is the black and white perspective that literally every other human-creative industry is wringing its hands over. But I think it misses a key difference that is already painfully obvious, which is creating new and engaging things will never be as simple as pressing a button. There will always be a human at the other end, pressing the button (or a human who deploys the agent, etc.)

The best comparison is photography. Instantly, a whole career path of portraiture was tossed out the window. Go to a museum and you see portrait after portrait - the best ones. There were millions of shitty ones made at all levels of society, and that job was replaced by cameras. But painting didn't go away, it got weird, it became anti-camera and more human, in a way.

This splitting of purpose and amplification of humanness is going to ramp up. Expect everyone to grow a taste for weirder, unprocessed music, experimental novels, wild and unexpected designs. Art is human communication and AI brings that into sharp relief.

Novels seem the most protected from AI - pulp/romance/beach novels will be crushed by volume and the sad remains of the publishing industry along with it, but interesting human novels will be just fine. And, much like with photography, I think AI will eventually normalize to its own artistic medium with writing, where careful usage will allow more ambitious work to appear that wasn't possible before, like a novel written using only sestinas, for example.