Thank God you're not running the country.
Assuming you're female (switch it if not): If someone told you at age 8 that soon, you'd go through puberty and grow a penis and beard, and have a voice 2 octaves deeper.. would you have been horrified? Now imagine a doctor gave you a pill and said: don't worry, once you take this pill, you'll 'recognise' that you're male and then be okay with growing a penis.
Would you take the pill? Or fight tooth and nail because you "know" you're female. Because even at that age, you "knew" your gender. We all did.
That's how these people feel. They know from a young age that they're a certain gender, it's just that their bodies don't match. So either operate on their brains (/ provide a pill) or operate on their bodies. But which would you choose? Or just be miserable all your life and commit suicide eventually.
You are lacking not only in empathy, but in basic understanding of the condition and impact on those affected.
They need support and it's probably just the lesser of two evils that we choose to operate on their bodies.
Definitely doesn't apply to children and I never agree with that - it should be illegal for kids.