How are the general public supposed to not only read someone's mind as to how they identify at that moment in time, but also prioritise getting someone's validation right over a lifetime of ingrained normal language shared meaning which has become automatic, probably when they're busy doing 97 other things at work?
Totally unreasonable demand on others. As usual it separates the world into those who must provide and those who must be provided for, correctly, right now, or God help them because they'll be punished.
Katie actually means that not being automatically perceived as a woman by a random stranger in the street is devastating to Katie's self belief in Katie being a woman. And Katie needs to work with Katie's therapist on dealing with the harsh sides of reality here, because Katie does not have that control over other people's minds and needs to face the realities of Katie's situation as a transwoman.
Frankly the more the kicking off and howling happens when someone, probably well intentioned, accidentally fails to please makes me less and less inclined to bother trying.