Social Order seems to take priority.
The Laws of Manu on selecting a Bride , to me, seems very rational.
As parents most of us follow the same without articulating or even aware of it.
To ensure Offspring without Genetic disorders Manu prohibits marriage with immediate blood relatives.
And with chronic illness and birth defects.
He insists on not marrying from a Family without a Male Heir.
Boys’ parents know how difficult it is to interact with a child with no brother/s for they normally are unaware of Mael view-point.
And in the event of the demise of the girl’s father, if there are no Males to interact on behalf of the Girl, it creates n running the Family at times of crisis.
Manu pays scant regard to the wealth of the Girl’s Family.
He has also provided some physical marks which might have a bearing on the character of the Bride.