Some are intersex. Biology can go wrong and produce a mish mash, no different to extra limbs, missing limbs, etc. A more important question is should minority interest override majority interest as the elites prefer? A biological condition has been hijacked and used as a political tool.
I presume you are male. Do you really believe you can be therapied into a female? Biology faults can result in a mismatch between the mind and body. I once worked for a woman who had a lot of dumb male thinking in her head. She dressed non-feminine as well. Her ideas were notably from a mish mash of male and female brain I found hard to work with. In comparison, when dealing with the minds of regular genders, there is some predictability to them.