When we get to $0 for any possible artwork of any quality - yeah, it's game over for everyone, the end of the industry. Right now we are far from it, thankfully. AI still can't produce usable commercial quality files. Most of them are simply not good enough, and even those that look kind of good have to be fine-tuned and reformatted by a human artist. Which takes real skill and effort and costs money.

And until someone does any job for some amount of money, a beginner can start his career by doing the same job for less money. This will still be the case no matter what technology comes next.