All interesting observations.
Diagnostic and Statistical Manual of Mental Disorders (DSM-5)
Rant follows.
Ought we take the DSM-5 as gospel truth?
Since 1952, DSM-1 has been revised several times (a committee is probably working on DSM-6). Each time it gets bigger. Occasionally a malady is dropped, but mostly maladies are added and elaborated upon. Question: Is the DSM a work of science entirely, or is there an element of fiction in the book, fanciful embroidery around a small hard nub (or nut) of craziness? Certainly, therapists need to get paid and the DSM provides handy codes for insurance companies. The more codes, the more opportunities to get paid. (Oh, surely a profession as rock solid as mental health wouldn't make things up for mere pecuniary reasons, would they? Maybe there is a code in the DSM for highly educated and self-interested persons who imagine disorders in their customers that aren't really there?)
Not very long ago, (1970) homosexuality was a listed disorder. The psychoanalytic thinking at the time was that homosexuality was caused by overly close mothers and overly distant fathers, or some such thing. The diagnosis had a warm, moist, Freudian feel to it. My first attempts to understand myself involved Kinsey, on the one hand, and some psychoanalytic texts on the other. The psychoanalytic take on my disorder was not very flattering.
Well, then in 1972 or 1973 the APA up and changed it's mind. (There were lobbyists; they didn't do this in their sleep.) A spate of books was on offer at bookstores, like "The Healthy Homosexual" by George Weinberg. He coined the term "homophobia" in 1965. So, queers are fine now. One joke about gay marriage is: "Of course gays should marry. They have a right to be as unhappy as everybody else."
Once upon a time, transsexuals were extremely rare. A 1950s Danish comedian/pianist, Victor Borge, said in one skit that "In Denmark we have three sexes: male, female, and convertible". This was in response to Christine Jorgensen, a soldier from the Bronx, becoming the first publicly known transsexual in the US in 1952.
Then Miss Jorgensen, now Ms. Jorgensen.
The varieties of transsexualism have multiplied among the dividers (the "each of us is different" crowd). I'm more in the combiner crowd ("we're all much more alike than different"). I'm sure that there will be more categories of gender dysphoria in the future, because the APA committee is stacked with dividers. They especially like unique identifiers.
It could change at some point in the future. Just as homosexuality has had its reputational ups and downs, gender dysphoria might also. Oh no! Help! It might be scaled back!
Look at depression: the numbers of people diagnosed with depression is absurd (or tragic, I can't decide which). My sense of the world is that a lot of people are very unhappy because of their life circumstances, and if they could change their circumstances, they'd be a lot happier.
Antidepressants (prescribed by the train load) help people drag themselves through their drab, wretched lives, but they tend not to make people happy. That's because most of these people don't have a mental health condition which can be treated. It's because they have drab wretched lives which could be made better, but that means change, and change is difficult. Really difficult, sometimes. So, doctor, please write another Rx so I don't kill myself or somebody else.
Temporary end of rant. Exit here.