What the family can do is help her recognize the traits of a man who might walk away. It’s not a perfect solution but it helps.
As a married man, I would never have even considered seriously dating a woman with career aspirations or goals and a college degree. With that background she can’t have both feet in the marriage… one foot is already out the door.
A degree is a safety net against the growing number of men who walk away from marriages. It prevents a person from having to work for a slap in the facecwage of 20 dollars per hour(an awful way to exist) because they were unwise and got married too young.