But another person could not get their birth certificate changed so that it said they were born in a different place? What if, for example, someone was born in the UK to Irish parents who moved back to Ireland when that person was a baby. That person grew up in Ireland, with Irish family, with no real connection to the UK. They are Irish. They would not be allowed to change their birth certificate to say they were born in Ireland because that's not what happened. It would be a lie, a fiction.
Yes, this, entirely. A birth certificate is not meant to represent your life story - it's a record of the facts of your birth. You can't claim to have been born in a different place or on a different date or to a different mother* so why can you change the material fact of your sex at birth?
I've never yet seen an acceptable answer as to why you we all agree it would be impossible and absurd to try to change your race or age, but when it comes to gender - which is frequently blurred as one into 'sex' nowadays, it's not just entirely possible, but that those who have any doubt that it is possible are hateful and in need of education!
Even if your ideology believes that gender and sex are the same thing and/or that you have truly 100% transitioned, what have you transitioned FROM, if you expect your BC to state what you identify as NOW? Surely, insisting that TWAW and TMAM and that a BC should reflect your 'transitioned' identity is actually seeking to deny and erase the experiences of trans people - if anything, that is clearly 'transphobic'.
Why don't we go further and put occupations on BCs (as in, the baby's - not the parents')? If you study hard at medical school and end up spending 40 years at the top of your career, why wouldn't you want 'Doctor' to be proudly shown on your BC? Why should damehoods, knighthoods and the like not be retro-recorded in an update of your BC?!
*I know the Guardian TM journalist did try to fight to do this, but they were rightly prevented from legally being recognised as the 'father' of the baby whom they had pushed out of their vagina - believing (correctly) that men can only be fathers but quite happily ignoring the fact that an actual biological man could never do what they had just done, which has been recognised since the beginning of time as the very action that makes you a baby's biological mother.
Personally, I think that goes one step further in the whole sphere of controlling doublethink: using somebody else's BC to validate your beliefs for yourself. How can a BC not have the mother's name on it? How is the baby meant to process the idea for the rest of their life that, although they have obviously been born and exist, officially, nobody ever gave birth to them? It would be like having the official authorised title deeds to a house, but without any address or location-marker on them!