Well, you've made a strong argument. I think at this point you've convinced me, I can't think any way around your example

Definitely counselling to accept their legs are working. The argument gets hairy here though, as there's other outcomes available to gender dysphoria than removing or refusing to use legs. There's a considerable difference in the process of transitioning genders than the process of removing a limb. The end result for the individual is still a functioning body with a now accepting mind, where losing a limb would leave you disabled. I can't say that helping a transgender person to accept their biologically provided body is a cure in the same way convincing one to recognize their legs work does.