Maybe there are some saintly principled people who will never walk away from responsibility no matter what, for whom marriage adds no value, and maybe there are

Maybe there are some saintly principled people who will never walk away from responsibility no matter what, for whom marriage adds no value, and maybe there are some feckless unprincipled people who will walk away from responsibility at the slightest provocation, for whom marriage also adds no value, but maybe there is a large intermediate population who may occasionally feel a moderate urge to walk but are dissuaded by the added difficulty that breaking a marriage presents (stigma, cost, legal process), and thus decide to stick it out. Maybe marriage is for those people.