That idea around LLMs reducing the signaling value of certain types of work is very interesting, and I hadn’t really thought about it.
I think about this effect with targeted advertising a lot, every since I read this article about why targeted advertising is so useless for both consumers and advertisers, even when it seems like on the surface it should be better for both: https://zgp.org/targeted-advertising-considered-harmful/
Once it becomes very cheap to do something, it becomes completely useless as a way to differentiate quality from crap.