A UK employment tribunal ruled that people can be fired for denying, as a general statement, the possibility of changing sex.

I don't agree with that opinion, but people should not be punished for stating it. It is an error to suppose that it must inevitably lead the speaker to say anything whatsoever about any individual.

With gender-neutral words and pronouns, it is easy to talk about a person in ways that are entirely respectful without ever identifying per as a "man" or a "woman".