I for one agree I wish no one had to go through this and there definitely is different types and degrees of GID. Some maybe mostly physical some might be mostly mental or a mix there of.
As for your idea of a true cure having mind detached from your body as far as gender it wouldn't work. It would be like the idea of a phantom limb.
We are what we are as a whole (mind, body and spirit) for better or worse and I wont say its easy since society looks down upon it. But we as of today do have some options to at least correct at least to some degree to fit into mainstream society or feel comfortable with ourselves and that is the important part. I think the real cure is us evolving ourselves to a better state for us.
Too look for what could be done to prevent ->-bleeped-<- in the first place would be like trying eradicate any portion of society really. What I mean by that is to rid the world of no one would ever need glasses or go bald or what have you the tricky part is taking away everything to make a utopia doesn't work either. If everyone and everything was perfect then it wouldn't be perfect because we would be bored and never progress to learn something new. Its the differences in people that make us all human just some cant get past certain differences. If we could only love one and another maybe peace on earth might actually happen. Sorry pipedream:) But we could sure try darn it.
Sorry perhaps a little off topic.