Because there is a significant group of people who will insist on using a trans person's birth name even if it's no longer correct, being deliberately hostile but trying to hide behind a thin veil of plausible deniability.

Unless that subject is right wing.

Wolf Blitzer:

>Wolf Isaac Blitzer (born March 22, 1948) is an American journalist, television news anchor, and author who has been a CNN reporter since 1990, and who currently serves as one of the principal anchors at the network.[1] He is the host of The Situation Room with Wolf Blitzer and until 2021, served as the network's lead political anchor.

Seems fine, right?

Tucker Carlson:

>Tucker Swanson McNear Carlson[5] (born May 16, 1969) is an American television host, conservative political commentator and author who has hosted the nightly political talk show Tucker Carlson Tonight on Fox News since 2016.

But Tucker is labelled conservative.

Founder Larry Sanger: "Wikipedia is Badly Biased" https://larrysanger.org/2020/05/wikipedia-is-badly-biased/

And you don't have to be right wing to see this. I'm a registered Pacific Green.

This is not a thing that is possible, although the idea that it could be has lead to at least a few transgender women claiming in court that they are innocent of the crimes they committed before their new name and presentation.