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.
When HN can't tolerate such an obviously true statement such as this, yet plenty of dog-whistles supporting homophobia and racism and transphobia in this thread stay upvoted, it tells me I probably shouldn't be spending time here anymore. I don't know if I've changed or the community has changed. Probably a bit of both. Maybe it's time to grow up and move on.
IE: Describing a straight male as shrill might make passersby assume he’s abnormal and abnormal men are viewed as homosexual and it would be really awful if you accidentally did a homophobia so stop using the word shrill.