There are a number of reasons mankind will look back at this current era as a dark period in history. Giving children hormones and puberty blockers, and, in some cases, mutilating their bodies to make them look like a member of the opposite sex will be one of the reasons. This is rapidly becoming the greatest pseudoscience of our age.
Link: https://quillette.com/2019/09/24/no-one-is-born-in-the-wrong-body/