That's a bit of stretch. You are more than welcome to your opinion, but the bible says the two become one in marriage. It says nothing of last names. I have NO idea what Mary and Joseph's last name was - nor Moses or any of the other people in the bible. Surnames started in medieval Europe, and so that would mean - according the current opinion - everyone was separate not one. Makes no sense. We all know that isn't so. As humans started to travel more you needed to learn to distinguish people, and so you could be John from a town or John the (insert occupation), or John so and so's son.. If you were predominate? It changed again.
We have the same name, although we did discuss prior to our wedding. It was also due to professional reasons. I didn't mind changing mine, but I did tease him about giving me one back...if we had a male child. My son has my father's name now. Thrilled my father to death! We didn't tell him until after he was born. So, our son has both of our names - his last name is the same as ours.
Some cultures take the male name, some cultures keep their own, and yes I have even heard of cultures where you take the female name. They are all one in marriage.
Learning about how last names - or surnames came about is pretty interesting to read about. WELL, if you like history that is. I do. It's also interesting that in this day and age some people don't even have last names at all.