The research on the subject is nebulous and being exploited by the left.
Again, YG you are using the term "science" to justify social engineering. You have further appropriated the term "biology" for the same purpose. I fear that such assertions by the left are in the long term damaging to public respect for science. More worrisome is the harm done to people by hormones and gender reassignment surgery. Perhaps this is tolerable with adults but certainly it is child abuse when done on minors.
YG if I understand your perspective, it is that the mental problems of those with gender confusion are the result of societal discrimination. I believe you have it backwards. People who have difficulties in entering adulthood due to secondary sexual characteristic issues are being sold a bill of goods that reassigning their gender through drugs or surgery will make them happy.
I found the following overview enlightening:
You're wrong. Refute the biological evidence, or continue to demonstrate your ignorance. Your choice.