I agree with AG on this. I don't see why the *cause* or *source* of gender identity would invalidate anything, or make anyone angry.
I don't believe humans have any sense of who they are, any consciousness, any idea that their minds and bodies are separate from the rest of the universe at birth. It develops in the first weeks of life, and continues to develop more slowly and subtly over the next months, years, even decades. And that includes gender identity.
If you never knew there was a difference between male and female, how could you have a sense of being one (or both, or neither)?
None of this, *none* of it, means that a person won't grow up being told they are a girl but feeling the entire time that they are not; it does *not* say those feelings are wrong or mistaken or should be overridden by other people.
"Gender is a social construct" does not mean that society gets to decide for you who you are. It will *try*, but it can be wrong.
Imagine if society took astrology very, very seriously. Imagine it believed and taught that your personality is determined by your birth month. Imagine it discriminated against people differently based on their sign, and expected each sign to behave a certain way. Most people just accept this without question, but there are some people born in mid-November who feel like an Aquarius, and other people who don't feel like the whole system fits them at all. Do these beliefs actually change who you are as a person? No! (*) But you cannot be said to have an "astrological sign identity" as an Aquarius if people hadn't invented astrology and perpetuated the belief in it.
(*) conformity is a strong force, and there is some influence to perform as the sign/gender you are expected to, and that *will* change you one way or another -- whether it means you fake it, hide who you are, rebel against it, just feel the stress of it, are attacked and discriminated against because of it, or simply find society absurd for trying to force it on you.