Hear me out:

We can all probably all agree that oftentimes, it already looks like something straight out of a fever dream, right? And our subconscious being as efficient as it is- doesn’t care to determine the minutiae of things like… the number of fingers a person has, or whether or not their limbs behave appropriately according to locked-down physics.

So maybe it’s that we find it so off-putting because we recognize it, but not from where, and this is bad because unfamiliar familiarity triggers discomfort.

Perhaps look up Uncanny Valley. It is similar in ways to what you are describing.

https://www.britannica.com/topic/uncanny-valley

The term you want is uncanny valley. AI generated images are just a little left of "realistic", not clearly enough "not real" to be perceived as such on first glance but also just barely not "real" enough to pass. That's a space that makes humans uncomfortable.

The problem with LLMs isn't that they are dumb. it's that they are actually smarter than about 50% of the human population of which OP would seem to be inset.

I heard you out.

And.... Nah.

inset

Pro tip: if you're trying to sound smarter than someone, make sure you know what the words you're using mean.