On one hand, I agree with you. But on the other, your goal is even more lofty (and harder to reach) than the one I suggest. Healthy marriages are great. But one motivator to keep a marriage from getting too unhealthy is to know in advance that divorce will never be an option.
Wouldn't help, because everyone goes into marriage during those heady days where you just know it's going to heaven. Best thing that ever happened to me was a divorce. If I hadn't have left the **** I would have had to have swallowed the business end of a pistol.