Why don't we ban anyone from having all documentation of their real name and sex destroyed?
As I understand it this is what is done in the UK, and it is absolutely bonkers, as very obviously, you don't know about all rapists that they are rapists when they apply for a GRS certificate.
The only case where it would make sense to have one's sex legally changed would be for intersex individuals who have accidentally been assigned a sex that does not match their reproductive organs.
(And for women to get around sexist inheritance laws, but apparently, that's exempt from the bonkers new policy, because misogyny)
In all other cases, real sex should be documented, preferred gender identity can be added, like the fact that someone wears glasses or uses a pseudonym is added.