Understood...me too.
Taking this further, assuming the teacher in this school is supplied with the preferred pronouns of all the students, how would the teacher determine which pronouns they honor and which they don't? Is it always obvious? Does that matter?
I have a child that has preferred pronouns. They/them.
A significant portion of their friends either use the opposite pronouns of their birth sex or they/them as well.
I screw up all the time remembering for any of them what I'm supposed to do. It is the most confusing thing for me. Part of that is that I'm old and I've learned to use language a certain way for decades and it's a very difficult and fundamental change.
I can't tell you how many times I've been hearing a story and the pronoun is "they". And then the story stops making sense because it wouldn't be something that a group of people would do, which is what I assumed from the beginning based on the use of a word that I've used all my life a certain way, and then it hits me. Oh, we're talking about that other person.
Not only that, but I have it happen the other way around where that same pronoun is in use and I'm assuming it's an individual and then I find out that we're talking about a group.
If I were the teacher, it would be a nightmare for me. I can't even remember my own details half the time. I'm kind of a space cadet. Like I said, I would probably try to honor people's wishes, but I would get it wrong a lot. I'd do with my own kid who, by the way, is an adult now. And not as concerned about this as they were originally.
As an aside, this is another reason why sometimes when I'm talking to people here, I get pissed when I'm called a bigot or a racist or someone that hates trans people or women or whatever...
And I've had many conversations with my child about my positions, just like the ones that we're having here. And my kid is okay with the fact that their dad tries to be respectful, even though he disagrees with a lot of what's going on.