Amusing clip.

There is, of course, no guarantee that filmmakers will pay any attention to a historical (or scientific, or continuity) advisor, nor correct any mistakes that are pointed out, but there's at least the
possibility that they might. (The history of what did and didn't get changed in TOS in response to the consultants' comments is interesting in that regard.) If you don't have an advisor at all, though, you have a 100% guarantee that any mistakes will
not be corrected.
Body horror? In TWOK?? What are you thinking of? The few seconds with the Ceti Eels and the ears? (What else is there?) I'm a notoriously squeamish person, and that never bothered me, even when I was a kid.