it doesn’t have to be about property, it can be about showing off that your officially one family now. And i think that’s a valid reason for changing your last name (aka family name)
You can always opt to take on a double name, you can both take on your wife’s name if you prefer that, or whatever. But just because a woman chooses to take her husband’s name, doesn’t mean that she’s now his property. Your children also aren’t your property just because they have your last name
That sounds pretty cool actually