I'm sorry, are you reading correctly?
The bolded part is actually 'princess' in the original Japanese. So the way to read this is:
In other words, the princesses are important, so marrying them off? Means the other side got a deal.
The husband isn't the trophy here. The princess is, because supposedly she has high value, special role, etc. and she's being married off as a symbol of peace and happiness. To demonstrate how Tenebrae values the peace they're presenting a great prize.
Good job on the male perspective.
I'm well aware of that. But guess what? This is a fantasy based on reality. The setting is contemporary.
But the relations are old fashioned. The roles? Typically sexist.
So basically, Stella was replaced by a trophy princess character. What a great step for female characters in Final Fantasy.