I wouldn't just say conservative women, since this is a really good explanation for anyone. My cousin and partner changed their last name to something altogether different when they got married. For them, it wasn't fair to the one for the other take the first's family name, so they just chose a new one. It was really hard for the rest of the family (there's a history with that family name that caused the hardship in its change, and the name holds a lot of weight to the entire extended family). Do you know what didn't happen, though? Absolutely no one, despite how hard it was for them, called the couple by their former name once they announced the name change. Not even our grandmother, whose family name it was and was carried over from her deceased husband. One of their former friends (not even family), however, refused to accept the name change, and kept calling them by their former name. I would consider that dead naming, too.

Name changes are hard for the people around you. Not always for malicious reasons. For me, for example, when a trans friend changed names, I kept calling them by the name that was ingrained in my head for a decade. I caught myself, and fixed it during the conversations. I apologized the first few times, and was assured that no apologies were needed, since it was clear I was trying. It took a bit, but the new name has now been associated with them, and I no longer stumble. Some people, I've noticed, find it offensive, for some stupid reason, when someone changes their own name, and will absolutely not call them by it. I will never understand that part. It's not your name--i's their name ffs--just flippin call them by their preferred name.

I went off on a tangent, but all this to say that you offered a good, generic, applies-to-all-generations explanation.