Your statement about the brain scans is inaccurate. Have you looked at this in the last year? A quick search turns up numerous articles from this year, 2018, between March and May and some older ones. Some studies were done in the 90s too. And they confirm brain similarities between trans/cis people. In other words, for trans people, the brain went one way, and the body went another. Do you believe those studies? This is why I asked the question. And this further marks the difference in the arguments.