My guess is that's California law. I assure you it is not the law elsewhere. Again, don't look at the existing structure. Think of an optimal one, focusing on personal responsibility. Right now, people are incentivized to hire prick lawyers, dig up dirt and trash the other spouse. Let's align incentives to come up with private solutions.
I can only speak to my experience, but there have only been two friends of mine (out of a few dozen divorces) where it hasn't been amicable. And the vast majority of those divorces were among high net worth individuals where there were real assets to divide. In those two cases, one guy had a child out of wedlock with another woman and didn't want to pay his wife a penny. The other is being run by the husband's parents who have always hated the wife. If he had his choice (and he would if he had some balls), he would have been divorced two years ago.
Also, comparing these forums where we have no face-to-face communication to a marital relationship is apples and oranges. I can be obstinate here, but if my wife and I were ever to divorce, I know for a fact we would work it out amicably. Primarily because we would put our children first. Secondly, because I wouldn't do anything to my wife to cause her to become vindictive. Thirdly, because I didn't marry the kind of person that would behave in such a fashion.