It is important because our society is structured around the differentiation of this category, as it relates to reproduction, culture and behavior, IE a lot. It might not be perfect and maybe we should change it, but that should be done democratically. Kids want to transition for myriads of reasons. And I've heard the suicide argument, and my understanding is that it's not true, and the studies that have been done actually show increased rates post-transition, but feel free to show me otherwise. I will say that even if it did help, one's therapy should preclude forcing others to modify their conscientiously held beliefs.