In its campaign against transgender rights, the Trump administration has been spotlighting stories of people who have regretted transitioning. A recent Federal Trade Commission event, titled “The Dangers of ‘Gender-Affirming Care’ for Minors,” included testimony from six people who had come to believe their gender transition hurt them more than it helped. The Department of Education marked “Detrans Awareness Day” in March. The following month, the White House ordered the National Institutes of...