Im not sure if you know this but the brain is a part of the body and the body is a fairly complex organism that isn't as binary as you'd obviously prefer it to be. Along with people who have gender dysphoria there are people born intersexed who have biological sexual traits that don't conform to strict definitions of male or female. These physical and mental "issues", as you call them, have various forms of treatment in order to help the people who have them lead more comfortable and happier lives. One of those treatments may be physical gender reassignment so their bodies are more in line with how they feel mentally, in other cases maybe treatment involves therapy and accepting the incongruity and learning to live they lives in a way that makes them happy. Either way that is between them and their doctors. What certainly doesn't help is stigmatizing them or treating them like their is something
wrong with them rather than just something
different.
So clearly you don't come from a place of empathy and wanting to help people but to be a dick. If that's the case why pretend otherwise? Are you ashamed of who you really are?