> as well as artists, photographers, and animators I know who have had a significant drop in typical advertising work with the advent of AI...

Much of this was offshored earlier this decade independent of AI.

The sunsetting of film and art production tax credits and subsidizes in much of North America while the UK, Europe, NZ, India, and Colombia dramatically ramped theirs up meant much of the industry got offshored.

And new media has changed how advertising works. Influencer and guerrilla advertising lands better as it feels more "authentic" amongst consumers. This also reduces spend on traditional advertising and the teams needed to do so.