Your idea would not have seemed strange before Ronald Reagan introduced so-called "no-fault" divorce. The people who file for divorce these days typically lack reasonable grounds for breaking the marriage contract and breaking the family. It's only been within the past quarter century that marriage as a legal institution has been abolished (elimination of the marriage contract through introduction of "no-fault") and transformed into an institution of pure political corruption and pork barreling. Once no-fault was introduced, it opened the door to -- among the other things -- group politics. Individual rights and due process were eliminated and everything became the man's fault. People who get rich and famous from corruption were given the perfect medium.
>>It's only been within the past quarter century that marriage as a legal institution has been abolished<<
This point cannot be repeated often enough. Most people still do not understand the significance of "no fault" over the objections of one party.
There is no other contract that is anything like this one, where the parties to the contract are not bound by it if they don't want to be.