All I know is ~ more people marry for the wrong reasons than the right ones.
I am amusedly/bemusedly watching a young friends' new marriage, as I am convinced she married the wrong person for her, and plenty of people who love her tried to show her the red flags. She has an immature expectation that once married, all will be happy, joyful fun-times. That fallacy started to crumble on her wedding day when Mr Wrong scolded her like a child for expecting him to do certain groom duties he promised her.
Now she is expecting, as that was the next block to check on her happiness list. And surprise! it's twins, instant family. Now she will have three children to look after, if you count her spouse in there. And she is miserable. Darn!
There is an old adage about marriage: The mans life doesn't really change a whole lot. But everything about the woman's life is altered forever. Does anyone else find that to be true?
Men & women seem to have different expectations. I know what I am supposed to believe about why people get married. But those good marriages seem to be few and far between, IMHO, apologies to those happy few.
I don't think marriage and commitment is the problem with most marriages. I think it's living with each other that kills it for so many. A dilemma to be sure ...