You don't have to be LGBTQ to see how important trans people are to Twitter's health. Many are still there because business is business, but many trans people and their allies have left because the new owner seems to hate them on a deeply personal level, and they have the professional wiggle room to ditch that promotional space.
People aren't downvoting your post for trans affirmation or that Elon doesn't like trans people. They're downvoting it because you are inflating the value of the trans population on Twitter as integral to Twitter itself. I would not be surprised if there is a higher percentage of trans people using Twitter relative to the general population, but I find it unlikely that they make up a significant enough portion of its users to even move the needle if they all migrated away to Tumblr, Mastodon, or another social network.
Most of the people I follow have moved off it. They use Twitter largely for announcements when they've put out something new but all their casual, unfiltered thoughts are going in Mastodon. Every time I check in on Twitter now it seems the noxious behavior to signal ratio gets worse.