What happens when the AI takes the low end of the market is that the people who catered to the low end now have to try to compete more in the mid-to-high end. The mid end facing increased competition has to try to move up to the high end. So while AI may not be able to compete directly with the high end it will erode the negotiating power and thus the earning potential of the high end.
Or graphic design, or video editing, or audio mastering, or...every new tool has come with a bunch of people saying things like "what will happen to the linotype operators!?"
I sort of hate this line of argument, but it also has been manifestly true of the past, and rhymes with the present.