There is no higher spiritual union than a monogamous relationship. When it fails, it's because one or both parties were unwilling to give themselves to the union.
If a person cannot even care for one other person unconditionally, if they can't demonstrate commitment and loyally, how can they be trusted?
And being intimately involved with another through the good and the bad, and to rear children with them, is an excellent way to understand one's self and what it means to be human.
I'm tired of kids who are wet behind the ears telling me about marriage. They're just coping with the fact that they're generally insufferable people who are unable to form any meaningful relationships. They think they know everything about humanity and society and its ills and what it takes to save it, but can't even commit to one other person. Smfh.