The distinction is that schizophrenia is treatable via medication (i.e. you can make a schizophrenic "normal" again). The same cannot be said for transgender identity - it can't currently be "cured" other than by making the genitals match the identity (or at least allowing the person to live as the opposite gender). If, in the future, a cure is identified, then the DSM will be amended to reflect that.
Correct, but that doesn't mean that it's not possible to cure it down the road...one of the points of contention I've had with the various debates on it is that researchers and the higher-ups in the various social/soft-sciences fields have been almost exclusively rallying around the notion that affirmation is "THE" approach to it, and to suggest that its even something in need of "curing" gets viewed as "offensive" or "transphobic"
To even suggest "hey, this is what we've got right now, but let's keep looking, we may be able to cure it some day" would be viewed as offensive by some.
However, that's probably a fairly low priority for researchers - unlike schizophrenics (or people with BPD, depression, and most other mental disorders), people dealing with transgender identity don't represent a threat to themselves or others, and aside from the societal consequences, there are no real negatives to allowing a person with transgender identity to live as the gender they identify with. Since medications - especially those for mental disorders - frequently have serious side effects, the favored way of addressing the issue is working towards societal acceptance.
But there are some potential consequences...
When a condition overlaps with a societal tone that suggests that it's something that should be a source of pride or empowerment or allows one to figuratively "sit at the
cool table", it muddies the waters a bit, and for certain clinics/clinicians, as the old saying goes "everything looks like a nail to a person who only has hammers" and we run the risk of overprescribing some of these treatments.
While it's not a perfect parallel, I would say it has some resemblances to the ADD/ADHD situation with regards to the part I find concerning.
Are ADD/ADHD things that are very real conditions that warrant treatment and certain accommodations for the people who are afflicted with it? Absolutely Yes.
Was there something of a "contagion" aspect where as soon as Billy's parents were told by Jimmy's parents "you know, after the doctor diagnosed our son with ADHD and gave him these meds, he started doing much better in school and some of his behavior problems diminished", Billy's parents said "gee, our son isn't doing great in school either and has some issues, maybe he has ADHD, let's take him to the doctor"?
Also Yes.
What I'd prefer to also not see happen is to have this particular topic go the way of the "healthy at any size/beautiful at any size" movement. Where there's something we all know is a problem and not normal, and have to not only pretend it is normal, but also pretend it's something that should be a source of pride and empowerment, else, be accused of being "fat phobic" or accused of "hating fat people", and then we end up in conversations about how
it's bigoted that airplanes charge people for two seats, etc...