However the issue is that it will be much harder to make a career in the digital world from an artistic gift and personal style: one's style will not be unique for long as AI will quickly copy it and so make the original much less valuable.
When it's harder to make a career in the digital world (where most of the art is), it's more likely that many artists will never get the opportunity to fully develop their artistic gifts and personal style at all.
If artists are lucky then maybe in a few generations with fewer new creative works being created, AI almost entirely training on AI generated art will mean that the output will only get more generic and simplistic over time. Perhaps some people will eventually pay humans again for art that's better quality and different.
Note that the fashion industry doesn't have copyrights, and runway fashions get copied very quickly. Fashion designers still exist in such a world.