Either something is wrong that needs to be fixed, or there is nothing wrong, and nothing needs to be fixed.
FWIW I think there is something wrong. The problem though, is that in our society, and to a large extent in our Church, mental issues are a great taboo. Even more so when the issue touches sexuality.
I have a hereditary condition called hemochromatosis. It made me very ill until it was diagnosed; many of the symptoms appeared vague and disconnected. Some were quite debilitating. When I was diagnosed (by my own wife, a family physician), and put on the road to treatment I got much better though I have to undergo treatments every 2-3 months for the rest of my life. People (and doctors) did think I was funny in the head, and just a hypochondriac, until I was finally diagnosed. There
was in fact something physically wrong, I was slowly being poisoned by iron overload. Now that I have a physical condition with a known diagnosis, nobody thinks twice about it.
But take the case of the transgendered. On top of the issue being poorly understood, they have to deal with this double taboo: it’s a head thing, and on top of that, it touches sexuality.
I guess our consciousness and mind are at the very heart of our souls; there must be some explanation why a physical illness from the neck down is treated with sympathy, but a mental illness is viewed with great suspicion unless it’s something very obvious like a brain tumour.
You have to understand that the transgendered are just trying to find a path for themselves that allow them to lead relatively well-adjusted lives; this does not make them evil, and does not make them specifically any worse a sinner than the rest of us; the same goes for doctors who adhere to rigid standards of care. They are trying to do the best with the training they have been given. Given that the Church hasn’t clearly at least publicly pronounced herself on the issue, it’s clear that the doctrine isn’t yet adjusted to the scientific reality because that reality is still poorly understood. It therefore makes no sense to me to try to cook up our own interpretations of what the doctrine
should be; by so doing we end up inadvertently fomenting prejudice against the transgendered.
The Church does have certain definitions about what marriage is and what makes a marriage valid. That definition has as its core a commitment between a genetic male and a genetic female who are capable of completing the act of sexual intercourse in a normal fashion, and it’s a definition based not on love but on its own physiological and procreative reality. That was the subject that the OP wanted to have answered, and I think the thread has in fact, answered it.
Beyond that there is no real need to argue against those who have, with no ill intent and to the best of their abilities, made a hugely significant life choice that may not appeal to our sensibilities. I am pretty sure that the decision Theresa Frances took was not taken lightly; and it does sound like it’s made her feel better in the end.
We live in an imperfect and as was pointed out, messy world. It isn’t always possible to have a perfect outcome especially in areas where both the science and doctrine aren’t clearly defined. I think we have to respect the choices that the transgendered make, and leave it at that, and not try to reduce the issue of major disorders to one of a simple black-and-white choice between right and sin.