"even have noticeable differences in their brains from non transgender people of the same sex"
Can you provide the evidence for this? Or is this something that you have read somewhere?
I have searched before for this information and found nothing that showed this at all.
Physically male brains are slightly different to female brains due to skull shape and size. This remains consistent regardless of transition status.
There IS evidence that hormones will make some changes to the brain, however, this is consistent with any person who is taking the very same exogenous hormone regime. To be clear, if a male person takes the exact same hormones for another purpose other than transition, this will be consistent with someone doing so for transition.
There IS evidence that repetitive actions and behaviours will create specific reactions in the brain. However, this also is consistent with anyone who is doing this particular action who does not have a transgender identity.
So, if you have evidence to the contrary, please post the links and I know that some people on this thread as well as me, will read it.
"You can't use the actions of criminals exploiting a system to prove that people cannot feel they are born in the wrong body."
Can you please explain in more detail how any person can be 'born in the wrong body'? Or if you don't think they can be materially born in the 'wrong body', can you explain why this particular group of people with a philosophical belief about their identity should be affirmed compared to another group of people with a particular belief about their body should not be affirmed and have special provisions made for them such as being put into a prison that affirms their philosophical belief?