费孝通的观点是，传统婚姻是奔着婚姻的本质（财产分配和后代抚育）去的，去之前知道婚姻艰难的，所以不会有太多幻想，在这样的文化语境下倒过得不错。而现代婚姻比较复杂，融入了爱情，披着浪漫化的外衣，人容易有过高的期许，所以再遇到坎坷的时候就会失望。我觉得这个观点或许能解释您提出的问题。
Fahiti’s view is that traditional marriages run for the essence of marriage (distribution of property and raising of children) and that it is difficult before they go, so that there will be little illusions, which are good in cultural terms. And modern marriages are more complex, integrated into love, and in romantic clothing, people are prone to high expectations, so they will be disappointed when they encounter difficulties.