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.
A screech is a high pitched sound, nothing more unless otherwise indicated.
I see a lot of people with no knowledge or experience with this common usage. That's fine, but it's arrogant to assume things you don't know are nonsense.