It is not unusual during the course of the day to discover someone who is totally invested in the idea that gender is totally determined by chromosomes and therefore accepting trans people for who we say we are is just an exercise in "political correctness."
A more apparent example of this kind of doubt can be found in a new post at The Federalist called, It’s Not Hateful To Point Out Bruce Jenner Isn’t A Woman. Whereas Robberson offered confused hesitation, Daniel Payne owned his rejection of transgender identities, as many other Federalist writers have done. He argued that journalists “are doing a grave disservice to a segment of the population desperately in need of psychological counseling,” causing them harm by “accommodating their illness.” This is despite the fact that gender dysphoria was declassified as a mental disorder several years ago.
Payne’s attack on transgender equality relied on myths about transition regret, and he distorted data about the high suicide attempt rates in the transgender community. Instead of recognizing that the same study also found rampant discrimination in employment, housing, health care, public safety, and public accommodations — basically every facet of a trans person’s life — Payne simply assumed “the presence of tremendous pain, confusion, and despair” must stem from their “misconceptions.” After asserting that Bruce Jenner “is not a man,” he concluded, “People who believe they are transgender need help, and they need the truth. We should deny them neither.”
--Zack Ford, ThinkProgress
PBS' News Hour took a stab at actually talking to people who had studied and are studying this issue scientifically and mot just confined their studies to what was limited by their personal biases.
That last part:
The Kellys say the emerging science of gender identity is less important to them than their child finding acceptance and support. They know it may not be an easy life for Skyler, but it will be an authentic one.
I daresay most trans people also aren't that interested in the scientific reasons that we are transgender unless it can help get people to accept us for who we say we are.
Transgender people aren't trying to "fool" anyone...but rather are just striving to be authentic.
Transgender Basics is an educational film from the Gender Identity Project