However, beneath this surface of solidarity lies a history of friction and marginalization. A central tension revolves around differing core concepts of identity. LGB culture, at its foundation, is organized around sexual orientation —who one loves or is attracted to. Transgender identity, conversely, is about gender identity —who one is in relation to internal and external concepts of male, female, or non-binary. This distinction has frequently led to a "hierarchies of legitimacy" within LGBTQ spaces. In the 1970s and 80s, some mainstream gay and feminist groups explicitly excluded trans women, viewing them as either "deceptive" men or as reinforcing gendered stereotypes. The infamous "Michigan Womyn's Music Festival," which barred trans women for decades under a "womyn-born-womyn" policy, became a painful symbol of this trans-exclusionary radical feminist (TERF) ideology. Within this framework, the struggles of a gay man fighting for the right to marry his partner could be seen as "normie" or mainstream, while the trans fight for basic recognition of one's name and pronouns was framed as a "special interest" or a distraction.
: This is the process by which a person changes their gender presentation to align with their gender identity. It can include medical treatments like hormone therapy, surgical procedures, and legal changes such as changing one's name or gender marker on identification documents.
Furthermore, the mainstreaming of LGB culture—particularly gay male culture—has sometimes created environments that are unwelcoming or even hostile to trans people. The hyper-masculine, body-centric spaces of some gay clubs or the transphobic "no femmes, no fats, no Asians" ethos of certain dating apps can mirror the very exclusion trans people face in straight society. Similarly, some lesbian spaces historically built around a shared female-bodied experience have struggled to integrate trans women or transmasculine individuals, leading to accusations of biological essentialism.