That's effectively what we've been doing for the past few decades. And the result is as shown in TFA: a generation of adults who will avoid marriage like the plague, because they've seen how toxic the results can be.
In one extreme instance the parents had divvied up the house with dad ending up in a quasi-finished basement like an unwanted old dog. If they ever crossed paths it was an instant war.
Fortunately divorce has become much more acceptable since those days (this was in the 80s). Back then people would stay trapped in an unhealthy marriage 'til death do us part'.