If there’s anyone trans advocates don’t want to hear from, it’s detransitioned people. Detransitioners are those who believed themselves to be of the opposite sex, embarked upon the process of socially or medically transitioning, and at a certain point, realized this was not the right path for them. They turned back. 

This is not an easy course of action. To believe you are something, so fully and completely, that you undertake drastic changes to physical self in order to become that thing, is hard enough. But changing your mind once surgeries and drugs have been introduced, and once you’ve gone through the difficult task of coming out as trans, must be exceedingly daunting.