Being transgender isn’t a choice.
Science literally backs this up.
See also any of the studies I have linked in this post.
https://www.npr.org/sections/13.7/2017/06/26/534367738/transgender-prejudice-and-the-belief-in-a-biological-basis-for-gender
https://www.nationalgeographic.com/magazine/2017/01/how-science-helps-us-understand-gender-identity/
https://www.sciencedaily.com/releases/2015/02/150213112317.htm
http://sitn.hms.harvard.edu/flash/2016/im-xy-know-sex-determination-systems-101/
https://www.ncbi.nlm.nih.gov/pubmed/19341803
http://www.jsm.jsexmed.org/article/S1743-6095(15)30695-0/pdf
https://transequality.org/issues/resources/national-transgender-discrimination-survey-full-report
https://healthresearchfunding.org/15-notable-ambiguous-genitalia-statistics/
https://www.scientificamerican.com/article/is-there-something-unique-about-the-transgender-brain/
https://www.bu.edu/news/2015/02/13/review-article-provides-evidence-on-the-biological-nature-of-gender-identity/