The problem with all of this is always intangible wealth, and unpaid contributions to the household. Person A got a degree while person B sweated away to keep a roof over their heads. If they divorce the day Person A graduates, with zero net assets, Person B gets the raw end of that deal (Unless it's a degree in Latin poetry.)

Or, person A made money, while person B did all the unpaid housemaking, childcare, etc. Or, person A made the money, did the housemaking, childcare, while person B bummed around, drunk all day.

All of these are special cases, and none of them can be covered by a one-size-fits-all policy. It's why divorce litigation is necessary, as a safety valve, and why pre-nups aren't ironclad.