This is a simple choice: Love someone or die.
Even if that someone is hideous, most people would hold their noses and choose the former just to save their lives.
But, what if the person you are to love can fulfill all your fantasies?
He is a noble from a respected family, an unparalleled swordsman, a handsome and suave young man, and yet he's incredibly romantic.
Put simply, even if you remove all the latter qualifications, the mere identity of a nobleman from the Xu Clan would be fatal attraction for these ladies from Xiling.
The daughters of noble families understand all too well the consolidation of class and the insurmountability of it. For them, there are only two ways to change their social class in their lifetime: marry a man who has the power to change it, or give birth to a child who can.
The sad reality for these non-martial noble ladies is that they don't even have the right to choose their own marriage partners.