Whose last name do you have?
My dad's, though my middle name is my mom's name, which no one cares about.
My mom disapproves this because it reminds her of the oppressive times of old China, when women had no rights, had their feet wrapped up as toddlers, were frequently sold out of family, where many families left baby girls out to die, etc. Even now, the sexism there is atrocious. You have an imbalanced sex ratio, girls are denied the right to education when the family can't afford everyone to go to school, and so on and so on.
Well, since it was the woman who gave birth to children why don't we have men changing their names to women after marrying?
She has to go through nine months of pain and loss of jobs to get a baby. My point is, it is silly for anyone, man or woman, to name themselves after their spouse after marrying.
Again, why not have the husband to name himself after the wife? Or have the two surnames hyphenated upon marriage (the we start squabbling whose name is placed at the front), causing extemporaneously long surnames after two or three generations? That promotes family unity as well. [sarcasm]I say the way to solve this is to genetically engineer the human race so that every person can reproduce equally, abolishing the concept of gender, just like worms do.[/sarcasm]
Don't blame divorce on something "trivial" as you just said. There are many other factors out there: couples cheating on each other, a new outlook on society in general, and so forth.