Speaking from personal experience, finding the right relationship can be HARD. I recently came across a rational take on finding relationship partners, much of which really resonated with my experiences:
http://waitbutwhy.com/2014/02/pick-life-partner.html
http://waitbutwhy.com/2014/02/pick-life-partner-part-2.html
(I'm still working my way through the Sequences, and lw has more than eight thousand articles with "relationship" in them. I'm not promising the linked articles include unique information)
Yes, I understood that you meant individuals rather than society as a whole. And I am suggesting that a policy of only marrying good people is not sufficient to keep a person from having to care about divorce laws. Unless e.g. you define "good" in such a way as to imply "would never get divorced" or "would, if getting divorced, never have interests that sharply diverge from their ex-spouse's" or something, which I would think highly unreasonable and which would make it even more impossible to be sure of not marrying someone not-good.
... Oh, wait. Is what you're really suggesting a policy of never marrying at all? Because that (1) is probably the only way to be sure of not marrying anyone who isn't "good" and (2) would indeed make it very unlikely that one would need to care about divorce laws.
In such a way as to imply that two civilized people -- even with different interests -- can negotiate and come to an agreement without engaging in lawyer warfare and without getting the justice system involved (other than putting an official stamp on the agreement).
Besides, what both you and VoiceOfRa (heh) care about is probably not so much divorce laws, but rather prevalent practices in the Family Courts which typically have very wide latitude in deciding on the post-(antagonistic)divorce arrangements.