I think you're unknowingly proving his point.
I think you're unknowingly proving his point.
The fact of the matter is, a previous relationship failing doesn't have to mean anything. You can grow as a person, fix previous faults, learn how to interact with people who you don't 100% mesh with. As most things in life, it matters the effort you put into it, and then you can always get very lucky.
Which is not to say that you can't end up with a poor fit anyway. You're just compelled by social expectations (if not legal requirements) to stay together despite the poor fit, often to the detriment of everyone involved.
Sometimes people do give up too easily, and could make the marriage work if they just had a bit more incentive to try. That's where systems which grant marriage more permanence shine. But on other occasions the problems run deeper, and separation may well be the correct answer.
In any case, since people have learned that they can get most of what they want out of a relationship without actually getting married, stronger / less reversible marriages just tend to discourage people from getting married in the first place.