Commercial creative workers are vulnerable because there's a billions-of-dollars industry effort to copy their professional output and compete with them selling cheap knock-offs.
I see this sort of convenient resignation all the time in the tech crowd... "creative workers only can blame themselves for tech companies taking their income because their art just isn't any good anymore!"
The poor quality "content" that's been proliferating recently has been created, largely, using the very tools that AI has built, or their immediate precursors. AI, for all its benefits, has only made that worse.
If you're saying, in good faith, that most of the infomercials, televangelist programs, talk radio, celebrity autobiographies, self-help books, scandalous expose books, and health/exercise fad books etc etc etc that came out 50 years ago were made for no reason beyond advancing human knowledge, you're either too young to remember any media from before our current era and haven't looked beyond survivorship bias.
Tech folks love sentiments like this because it entirely emotionally places the onus on the people getting ripped off by big tech companies for being ripped off. If their work was that awful, companies wouldn't be clamoring to vacuum it up into their models to make more of it. Nearly all of the salable output from these models exists solely because it took a creative product someone made with the intention of selling it and it's using it to sell a simulacra.
It's using nostalgia to deflect guilt for harpooning the livelihood of many people because it's just more convenient and profitable to empower mediocre "content creators" they use to justify doing it.