We're at a sort of a liminal point in history.
For the first time in the modern western world, it's starting to be socially acceptable to be a trans person publicly. For most of our history that wasn't the case.
And we're not fully there yet. People who come out as trans still get disowned or abused by their parents for it, or mocked by their peers, or accused by politicians of faking their identity to try to get into the wrong bathroom.
In order to transition, the general recommended route is to consult with a mental health professional, who will normally recommend that a person shift into living as the gender they are transitioning to for a significant time before begining any medical steps. This will begin with things like changing pronouns and mode of dress.
This is all to say, you can't always tell by looking at a person, and that people who are transitioning can sometimes be in a vulnerable place where they're not assured of respect and support. And that sucks.
I empathize with your discomfort with change. It's nice to know things, it's nice for things to be simple. I don't like things that were previously simple becoming more complicated either.
But maybe take your own psychological discomfort as a starting point and think about the psychological discomfort of people who don't know if introducing themselves with a new name or different pronouns than they had before is going to get them harassed, or labled as crazy or perverted, or even attacked. Hopefully you can see that their potential distress around these issues is probably more fraught than what you saw in yourself.
One small thing that can be done- by normalizing pronoun listing, it sends a message that this company, this space is welcoming of people whether their pronouns match what one might traditionally have expected ot not. And it allows those few people to communicate this difference without having to bring it up out of the blue, or correct someone or do it in another way where it might just be scary.
