Families should stay together whenever possible. Families are the base structure of society. The family should preserved, unless circumstances make it untenable or unsafe. Those who are compelled to dissolve their marriage face difficulty and uncertainty in the wake of the shift in circumstances. The legal system provides a way to resolve disputes over child custody and support and division of property for those who cannot make an agreement with their ex-spouse.
Sometimes people create families without being married. They too need help with child custody and support issues.