This article talks about how transgender people are portrayed in film. One example of a film the article gives is Boys Don't Cry. I have not seen this particular movie, but I have seen a documentary about Brandon Teena, the transgender man who was brutally raped and murdered simply for being transgender.
Films about transgender people portray transgender people in two ways. One, the transgender person is alone in the world, and two, the transgender person is a member of a community of other transgender people. Why aren't filmmakers making films about transgender people who have support from a heterosexual person of one gender, or a whole community of heterosexual, one-gendered people? Are all movies about transgender people based on tragic real-life stories?