I don't think there's anything inherently wrong with sexxing a human body. It's important to know for medical reasons. That's why the birth cert sexxes us.

Is it? Hormonal configuration is ultimately more useful an indicator for treatment that chromosomal configuration is. If is generally far more important in treatment to know the level of estrogen or testosterone than it is to understand the presence of a particular primary sexual organ - the exception here are wombs and ovaries which require explicit care.

I think "sex" and "gender" as terms are not well defined. They encompass a whole range of assumptions which make them useless for anything - if I am prescribing medication to treat heart failure knowing the persons estrogen level is essential - knowing whether or not they have a penis is inconsequential.

Birth certificates are a relic of a dying age - they are effectively useless as technologies exist that allow cross fertilization, multi-person babies and so forth - they don't even function well in their primary job of preserving genetic lineage anymore.

So do we replace it recording the chromosomal sex of the infant? Does that mean we bring in chromosomal testing for all infants? Does it really matter? I would argue no - my doctor knows my hormone levels, like they know my weight, height and all the other important bits and pieces that go into make me healthy - chromosomal sex has never come up.

Gender Dysphoria is likely best classified as an intersex condition - as society becomes more equal I can see the barriers between what we currently categorize as a binary shifting - we will still treat gender dysphoria the way we do now (hormones and surgery) - but socially there should be no need to change anything else - as ultimately everything should be genderless (names, clothing, expression etc.)