If she's not willing to take the man's last name or wants a double-barrelled name, to me, that's a red flag.
Then again getting married out of love and signing a marriage certificate is adding old traditions with a 19th century practice. I'm never doing both, unless I see a clear and obvious financial gain.
In this society, a marriage is simply a merger of two companies... 'til death do us part' clearly a fallacy, when all that's needed for a divorce approval is to write 'irreconcilable differences'
A divorce is a dissolution of a corporation and asset division between two companies... That's why the government's approval is required to get divorced, similar to starting and dissolving an actual company.