This whole thread today is bizarrely funny to me because I actually went and got my birth certificate updated this morning.
And, well, I got it updated (and I know many other trans women who don't bother) because I needed that done for immigration purposes.
My documents need to match as much as possible for immigration purposes, or well, I can face lengthy delays or even outright rejection.
In NYC though, I can't change my gender marker on my birth certificate without bottom surgery (SRS/GRS/as-you-will) and it worries me tremendously.
I'm worried that the country I'm migrating to will look at my birth certificate and decide that I'm some other gender despite
all of my other documents stating clearly that I'm female.
In spite of my
outward appearance being that of a woman's.
And all it'd take is one asshole immigration clerk to decide to fuck it up for me.
And then, many tens of thousands of dollars to fix it (in legal fees (yay lawyers?), or a surgery that I'm not even ready to seriously comtemplate let alone undergo).
It's scary, and the prospect of being misgendered *officially* because of a single gender marker on a single document out of many documents that say otherwise really frightens me.
So yeah, in this case, it pretty much serves only as identification.
It's not a historical record of my birth -- you'll find that the country I'm moving to doesn't even really care where/how I was born (only where I'm a citizen.)
These documents are primarily used to collaborate each other. That's all they are. And differences can really fuck people.