DSDs are disorders because they impair the healthy functioning of reproductive organs or other bodily systems, often leading to severe health issues and infertility.
This is not a moral claim.
Why is it a disorder? Oh, wait, I forgot. It's because God made Adam and Eve, isn't it, Zachary? And so now, each being's perfection must be judged according to that teleological standard. If not God, who else are you going to appeal to to ground final causes?