Oh... stupid me. I thought it was someting about LIFETIME COMMITMENT.
Not the governmental/ legal version. In fact exactly the opposite, the legal version of marriage exists in a large part to create the starting point of property distribution if said marriage is dissolved. The lifetime commitment thing is in the religious version of marriage, which is vastly different. It’s really unfortunate we use the same word for both, because they really are two different things, even if they often happen at the same time.