Perhaps that is how one's parents end a disagreement
If sex and gender are different why all the fuss about "gender transition"?
Aren't you already whatever gender you wish, decide, or create in your mind?
No "transition" is necessary.
But then you wouldn't be getting any attention, which I suspect is the basis for this ideology.
Otherwise, if gender and sex are different, and a man getting breast implants and wearing a skirt and make up is "transitioning", you just described a transsexual.
But that sounds ugly. More accurate description, however.
Opinions are not absolutes. I'm not trying to change your mind, simply disagreeing with what, in my opinion, is faulty reasoning.