Earlier quoted context omitted.
"Screeching" in english (at least North American english) is typically a gendered derogative. You generally wouldn't say a man was "screeching", not unless you also wanted to imply he was effeminate. By avoiding the word, you avoid insinuating the target's gender is part of the issue, and/or avoid insinuating that the target is effeminate when they "should not" be, i.e. you avoid homophobia.
Either I am completely out of touch, or this comment is nonsense. A screech is a high pitched sound, nothing more unless otherwise indicated.
It's not "nonsense" -- it's "woke praxis." By asserting this new understanding of language, woke activists are able to shape social reality. That's the point of the movement. So comments like this are a form of enacting that world. (And I suppose comments like mine are ways of pushing back against it.) Anyway, the wokies are correct about this very applied or pragmatic aspect of language.