You're missing the issue, unfortunately. What you say is technically correct, but as long as a minority id actively persecuted they have to be actively shown to be normal and nice people to, well, normalize their existence. And right now the evil people are winning, so it's even more important to mention it. We're as far away from trans being normalized like left-handedness as it gets.
I see why this might even annoys some, but it's not trans people who want to be in this situation. We (yes, hello 👋) just want to fucking live our lifes in peace and happiness, without the constant (additional) fighting and fear for our life.
About Lemmy… well, it's the current alternative to corporate media. It's just natural that those who're vilified and cast' out are the first to arrive here, as well as their allies. 😉