Here's something that people need to remember. There's an old saying, "If you have not supped from the same cup, you cannot know the taste." So, if you were born in 1927, and joined the Army straight after finishing high school and you were in a Mess Hall having breakfast when you were told that the War was over, but you stayed in the Army until 1949, you would have a different perspective than if you had been born in 1923, and joined the Army at 18.5 and had fought in the Battle of Iwo Jima.
And let's take Japanese Americans. Even if some only have an ancestral connection to Japan, and they eat hamburgers and pizzas, and drive a Chevrolet or a Ford, will never be viewed as Americans by some Americans. Sadly, for some transwomen, even though statistically a transwoman is more likely to be accepted by her mother than her father, and even though some ciswomen will take them under their wing and take them clothes shopping, some women will never accept a transwoman as a woman.
Okay, a transwoman will never know what it's like to menstruate, but many a transwoman prior to transitioning, has experienced violence. When I was in my first years of high school (Okay, I went to school in Australia, and in my state, you did seven years of primary school and five years of high school) I couldn't even go to the toilet at school without being followed in. I remember going into a cubicle to pee and two boys jumping up over the walls and spitting mouthfuls of water onto me! I was regularly assaulted by guys. When my academic performance suffered, my Year Nine English teacher, rather than saying that I needed to take a more diligent approach to my schoolwork, should have said (she expected me to almost be a father figure to a friend, as well), and possibly would have, if she knew more, "I accept that when you are constantly anxious, you cannot easily learn. If Peter were to have those influences removed from the school environment and was in a safer environment, Peter could thrive."