There is no surgery which changes a person's sex. WHY doesn't everyone know that? They use these misleading terms like "sex change surgery" -- there isn't such a surgery! Humans cannot change sex.
"Do you think people who have extreme cosmetic surgery should be granted legal documents which uphold their DELUSIONS of being the opposite sex?" Word the question THAT WAY.
If they could actually change someone's sex with surgery, then at least we'd have something to discuss the ethics of. As is, all they can do is take away your sexual function and replace it with a high likelihood of pissing through a catheter and shitting in a bag the rest of your life.