Wouldn't it be crazy if we're all products of our environments, including our cultural environment, and if I never said all trans people, but said it "was linked to".
...guess what, everyone's gender and sexuality is "linked to" hormones, that's just normal.
....like the sex of crocodiles is determined by the heat the egg is kept at, knowing that fact (and even altering the outcome) doesn't make the sex of the baby crocodiles any less legitimate once they're hatched. The environment is a factor in who we are, and saying so isn't an attack. Just accept yourself, who ever you are.