Precisely. I will not deny physical reality in the name of kindness or anything else. I do not care one way or the other what kind of gender feelings anyone has or whether they match their sex or not. That information is irrelevant to the material reality I inhabit and that can affect myself and others. There are a multitude of facts about this world I find deeply unpleasant, often to the point of despair or anger should I ruminate about them. It is not a kindness for someone to deny these realities in an attempt to ease my mental anguish, as denial of reality accomplishes little but delaying efforts to deal with that which we cannot change.

To refuse to lie about the immutability of sex no more necessitates a callous action than to refuse to lie about the health consequences of obesity necessitates calling random fat people "fatty." Should we also pretend that being obese is as comfortable and healthy as being within a healthy weight range so that we do not make people struggling with their weight feel bad?