Mental illnesses can also decrease violence. Some people can have so much empathy that it's debilitating.

And the people you're thinking of don't have a transsexual disorder, they have something else or are just plain evil, and they abuse the trans label because they know they can claim it and everyone has to accept it without question. You've bought the agenda of the woke transgender community by thinking these people are legitimate. Real ones seek medical treatment and wish they were simply born the other sex, and they try to go stealth and live normal lives.