Although I do read a lot of philosophy books, I came to this point of view from a different direction.
I took a course awhile back taught by a retired military professor on communications and it was eye-opening. He covered what you would expect but with a slant towards 5GW, irregular warfare, political warfare; and heavily referenced Gershanek as a supplemental book; which is published by Navy Press.
(https://www.usmcu.edu/Portals/218/Political%20Warfare_web.pd...)
Communications holds a privileged position that is tied strongly to and influences our individual psychology and identity.
Reflected appraisal is how we adopt culture from our parents, and it can be manipulated to distort that in ways that are harmful, if you understand the mechanics; and distortions cause psychological stress (the basis for torture), which can be used for malign influence, destructive interference of core identity, compulsion, or torture.
This along with other structures, elements, and clustering, can cause changes where if you aren't mindful of your environment, you don't recognize its happened, all you have is confusion, as your identity/soul gets pealed back and hollowed out, and this is the basis for how cult programming, and the related involuntary hypnosis works in practice. The same goes for PoWs from the 1950s.
There's quite a lot of material on this if you know where to look.
> Some ways in which you have seen the perceptual abilities of coworkers erode over time?
This is going to sound very subjective, but their overall cognitive speed has decreased dramatically. When you learn a skill to the point where its automatic, you can get a good flow going from a to b to c pivot to e, etc with no delays; and they struggle with each step/connection, each reasoning portion. Almost like there's interference, but its persistent and consistent; and they either don't notice, or they get defensive.
When they need to make a determination or design decision, they will miss the pivots, and not account for things that lead to significant mistakes which would never have happened before.
The solutions they come up with are for the most part no longer creative. They used to take functional structures they had collected and knew well that worked, and repurpose them, or apply them in ways that were quite creative towards a problem that they defined. Now they largely don't; and the definition of the problems they define are only slightly better than the LLM at this point; it used to be much better.
A lot of due diligence is also no longer being done. When asked about specific things, instead of being able to answer, they get confused, sometimes even incoherent, behaviors that seem very dementia-like, but these are guys almost fresh out of college in their mid 20s, and they aren't on drugs (we are all tested regularly).
There are ways people can be blinded, where they will adopt a misleading stance based upon structure (without any reasoning), even very intelligent people.
I'm of the opinion the inconsistency of the LLM's responses which are treated as communication, are gradually damaging people. Incidentally, people who have had a lot of exposure also have stopped taking on the more difficult or challenging tasks.