You cannot change DNA nor the years of what his hormones did to his body development starting at the moment of conception.

I have compassion for people who struggle with mental issues. But he will never be a "woman". So stop using 'trans' in an effort to erase women and their unique experience AS women.

He can live his life as he pleases, cosplay 24/7. But he should not be able to compete in women's sports. Period. This is just misogyny.