Marriage makes proper channels for sexuality and fertility. A woman is constrained to give her children only one possible father, and a man is constrained to acknowledge his children and provide for them. Not equal but complementary. I believe it was a rabbi who wrote an essay that explained that so well. As much as I hate to admit it, it allows for polygyny, although the Christian West decreed that polygyny is not compatible with what society ought to be.
Now the West seems to think that marriage is a public acknowledgement of romantic attachment and personal fulfillment.
But I can't read that headline and not have the wedding scene from The Princess Bride come to mind.
Self-fulfillment, which it can’t ever truly do. Both partners would be sucking the other emotionally dry.