There is only one thing wrong with her premise however: it is entirely unproven.
You will find no medical journal, authoritative book or scientific research which makes any sort of clear dividing line. Even Harry Benjamin, who arguably had the greatest exposure to this condition given his long and extensive patient history, had trouble making clear cut distinctions between patients. The best he could do is fashion an approximate categorization based on the intensity of the dysphoria they experienced. He also never made any value judgements about any of them.
Most of the members of the group I refer to, were people who transitioned in the 1960’s and 70’s and tried their best to disappear into the woodwork of society. They did so with good reason because the world was far from ready to receive them. Even with today’s level of education we still get the most enormously ignorant comments from people as any perfunctory look at the comments section of an article on transgender issues will illustrate.
The vast majority of these early transitions were by androphilic transsexuals who proceeded as privately and as quickly as they could and tried to make new lives for themselves in stealth. Many married and in some cases their own husbands did not even know about their past.
As this group ages and disappears you don’t see any new recruits taking their place. This is because society is slowly changing and there isn’t the same battle lines drawn between androphilic and gynephilic transsexuals. The biggest focus in fact became the work of Ray Blanchard who began writing on this topic in the late 1980’s and saw the condition strictly as a sexual deviation.
By all current evidence, gender dysphoria appears to be a graded phenomenon rather than an all or nothing proposition like some of these early activists believed. No one chooses it but rather it chooses you and you must deal with it in whatever manner allows you to live in balanced and healthy way.
For some that solution may be transition but certainly not for all.
The blog (which appears not to be updated any longer) can be found here