It was intended as political theater to begin with, but the mere presence of a token dissenter, invited, presumably, to demonstrate that the organizers were serious about actually examining the issue, proved intolerable.
The conference, held February 2-5, 2017 in Los Angeles, drew more than 600 medical clinicians and scientific researchers active in caring for gender non-conforming, gender-confused, and transgender adults, adolescents, and children. They met to “affirm our dedication to transgender health” in light of “uncertainty due to the change of leadership in Washington, and concern over what the consequences may be for trans health and trans rights.”
Kenneth Zucker, a psychologist with years of experience treating gender confusion, was slated to speak on several panels at the conference. He was a token, actually, a voice representing politically disfavored but scientifically weighty research that cautions against labeling gender-confused children as “transgender,” in part because the majority of these children later “desist” from cross-gender identification.
... Karasic admitted that he’d intervened on another occasion with the American Psychological Association to prevent Johns Hopkins researcher Paul McHugh, an outspoken opponent of transgender reassignment surgery and medical interventions for gender-confused children, from presenting: “When Paul McHugh had an accepted proposal at the APA,” Karasic said, he (Karasic) had “intervened with the scientific committee” and “got them to revoke their acceptance” of McHugh’s paper. (Apparently the test of whether a paper “advances” transgender care is ideological, not evidence-based.)
The conference moved ahead, minus its lone cautionary voice, leaving the medical zealots free, at the urgings of transgender adults, to embrace ever-earlier medical and surgical intervention for confused and gender non-conforming adolescents.
So they did, giving presentations on a variety of topics ranging from social transition for young children (“what do we know?”), puberty suppression (“lessons learned and unanswered questions”), puberty suppression and loss of fertility (“puberty suppression…effects on fertility…and the associated ethical and legal ramifications”), to double mastectomies for teen girls (“impact of male chest reconstruction on chest dysphoria in transmasculine adolescents…a preliminary study”).
This is exactly how global warming became "settled science". Papers questioning the theory were suppressed, scientists who dared question the hypothesis were denied funding and driven from their universities, until almost no one in the scientific community dared publicly debunk it. We're seeing that process unfold again on this particular mental illness.