BACKGROUND: Gender assessments are often required to access gender-affirming medical interventions. These assessments are typically defended as a way of preventing regret, offering a compromise between the interests of trans and detrans people. Whether they do is integral to ongoing debates about models of care in transgender health. METHODS: Building on previous work demonstrating the inefficacy of gender assessments, this article explores the impact of gender assessments and argues that they are detrimental to detrans people. RESULTS: Assessments appear to be detrimental to detrans people because they disincentivize honesty and authenticity, inhibit gender exploration, increase shame and anger associated with detransition, foster transnormativity, hinder the development of a strong therapeutic alliance, and diminish the quality of informational disclosure. CONCLUSION: Given the detrimental consequences of gender assessments, clinicians should reconsider gatekeeping practices in favor of supporting patient decision-making and offering better care to people who detransition.