I think a lot has due to with people trying to live perfectly fake lives. Sometimes, people only gain awareness they are transgender late in life. But I think this is rare. Unfortunately, most people try to pretend they have no issues at all, toss it over and bury them deep in their heart until there comes a point where they break and crush in.
They end up living their lives for other people, to gain acceptance and to meet other people's expectations so they get married, have kids... etc. And it goes on. Honestly I can understand completely how as a wife it's devastating to face such a reality, after all, the person they thought their husband was and they thought they knew is in fact someone completely different. Now just because someone's transitioning doesn't mean their whole personality will mutate, but that doesn't change the fact that partners are appalled at how little they actually knew of their partner. The mask falls and what once seemed like a real person with feelings and certain attitudes has now faded in to façade that is no longer being put up. And then the wife realizes their husband is a completely different person. They fell in love with a lie, think they. Past the phase where they are getting in touch with their partner's real feelings and intentions, they may come around or upon realizing their husband is in fact a really completely different person they fell in love with, divorce is almost inevitable. They can't handle it. I personally despite being transgender I probably couldn't either. And I would be shocked, sad, angry, divided at my husband if he told me after 30 years of marriage he was a woman inside. Now that doesn't mean I woudn't try to understand my husband's situation, but I would be crushed inside. And I would feel cheated that my husband didn't tell me earlier so we could cope with it in a different way, now having lived a whole life together would make things much harder. Especially when you have no clue at all they are, no hint, no nothing. I felt a lot of times wifes of transgender women are demonized here for not accepting the situation easily or making a decision to break it off, but honestly I don't see why, when their reactions are 100% understandable. Put yourself in her position. I know transwomen who are married have their side of the story too, but here on this topic we are mainly talking about their wifes and I feel their voices should be heard and more sympathy should be offered to them, they often end up feeling neglected. And honestly telling them you're trying to live as your true self doesn't help either because it reinforces their belief that all their lives you have showed a lie to her. That's why most marriages end, and frankly, is understandable. However, I completely feel transwomen's struggle and my heart goes out to them for doing the right thing even if it's late. But honestly think twice before you indulge yourself in a lie again. That's all I have to say.