The reasoning that keeps most married men in the closet longest is the generous one. You're staying because leaving would hurt her. Because she doesn't deserve that. Because the marriage has been real, the life has been real, and blowing it up feels like an act of cruelty you're not willing to commit. You're holding it together for her sake.
That story is hard to argue with. It also doesn't hold up.
Protection means shielding someone from something harmful. What the closet actually does is remove her ability to know the true shape of her own life. Every year she spends inside the marriage, she's making choices based on a picture that's missing a central fact. Where to live. Whether to have children, or more children. How much energy to put into a partnership that has a ceiling she can't see and can't name. She's navigating with bad information, and she doesn't know it. Call it what it is: management.
The intimacy ceiling is real and she feels it. Most women in these marriages do. There's a quality of partial presence, a depth the relationship can't reach, a version of him she keeps almost touching but never quite. She usually finds explanations for it: he's stressed, he's not emotionally expressive, this is just what marriages become over time. She carries those explanations as her own, sometimes for decades. The weight of that belongs to the closet, not to her. She just ends up holding it.
Here's what time does to this. Every additional year inside the marriage is another year of her life built on incomplete information, another year of intimacy deficit she absorbs and explains away, another year of grief she'll eventually have to do. The men who stay longest thinking they're being kind are often the ones whose partners have the most ground to cover afterward. More years in the dark means more to grieve when the lights come on. Staying doesn't reduce her pain. It defers it and compounds it.
The work I do with men at this point almost always surfaces the same thing. Underneath the protection reasoning, there's a second layer: leaving is harder. Coming out to a spouse after a long marriage is one of the most difficult things a person can do. It requires holding her grief and your own simultaneously. It costs things that matter. The protection frame is real, but it's doing double duty: it's also making it possible to not do the harder thing yet.
Actual care for her looks like giving her the information she needs to make real choices about her own life. What to do with that information, how to do it, when, and with what support: those are real and complicated questions. But the decision to withhold the information in the name of protecting her is the one that doesn't survive honest examination.
The person the current arrangement is most protecting is you.