If you woke up tomorrow and your consciousness had been downloaded into a male body, would you be a man? Feel like a man? Immediately understand that you simply were not a woman, because the only thing that was determinative of that was your biological makeup?
Sigh.
I want my laws to be based on the actual real world, not on one of Heinlein's (weaker, IMO) novels.
No-one on this thread is ever going to find their brain downloaded into an opposite sex body.
It's all about the practical consequences of legal changes in the real world.
Almost all of us do really, in the actual world, go for smear tests and most (not all of us) feel more comfortable having that carried out by an HCP of the same sex (sex, not subjectively felt gender). Do we have the right to bodily autonomy and a degree of choice over who examines our genitals, or must we cede this lest we be struck off a GP's list for being transphobic?
Many of us will need to access rape crisis or DV shelters. Do we have the right to seek out provision which is same sex if we find that male bodied individuals are triggering, or are all same-sex only centres going to be forced to shut under the guise of inclusion?
Some of us will even commit crimes worthy of a custodial sentence. Will we have the right only to be forced to share a cell with a female bodied individual, or may we find ourselves in future banged up with an individual with a penis?
Some of us will want to play contact sports. Will we be able to play this in the knowledge that the risk of spinal injury, while not absent, is low, because we'll only be playing against individuals with roughly the same physique and physical strength as ourselves, or will we be forced to play against individuals considerably stronger and heavier or give up the game we love?
Those are the sort of practical, real world consequences I want addressed. With practical, real world solutions. Not science fiction crap about brains being downloaded into the wrong body.