However, polished to a point that we humans start to lose our unique tone is what style guides that go into the minutiae of comma placement try do do. And I'm currently reading a book I'm 100% sure has been edited by an expert human editor that did quite the job of taking away all the uniqueness of the work. So, we can't just blame the LLMs for making things more gray when we have historically paid other people to do it.
Xe also occasionally reminds people that, equal temperament being what it is, this pitch correction is actually in a few cases making people less well in tune than they originally were.
It certainly removes unique tone. Yesterday's was a pitch corrected version of a performance by John Lennon from 1972, that definitely changed Lennon's sound.