GID, what a made-up disorder.
1st of all, there is no gender, the term gender is a social construct that came apart from its original terminology used in ethnology/archaeology (since we usually associate certain sexes with certain social positions and certain ritual burials).
There are only two sexes. Male and female. Since in human beings a functional hermaphrodite isn't possible, this even holds true for those people falsely listed as "intersexual"(they are not inbetween the two sexes, they have either one set or no fertile gonads).
The genes decide which sex you are, point.
There is no way to turn a man into a woman and vice versa.
You'd have to replace +- all genetic information regarding sex in the human via virus RNA/DNA to make that happen, and that's simply impossible in the born human.
This is the undeniable truth, yet the socialists and their stooges still sell people the idea they can become anything they want, be it e.g. dogs, the other sex or some multi-identity freak.
Such manga should wake up the people to reality, not sell them a stupid ideology that destroys their humanity and social identity forever.
SRS should be forbidden, if you look up its history it all goes back to some crazy guys who wanted to make scrupulous experiments on the human body(some of them were e.g. involved in studies on chemical castration of sexual predators in prison).
A lot of people who underwent SRS commit suicide shortly after because they realize the error they made yet can't go back, so they go into a downward spiral of depression and grief about their lost identity.
Imo it's ok to be you as long as you live according to your genetic identity (i.e. a man as a man and a woman as a woman).
Some women are less feminine and others are more, while some men are more masculine and others are less, who cares?
Just don't throw away the only biological identity you have to soothe some ideals/ideologies/whatever non-reasoning.
This world is way more tolerant towards people who embrace their biological identity than those who throw it away for personal&temporary gain, and that's a good thing, it's the way humanity survived for about 190000 years already.