I have noticed in watching lately, that now that couples are starting to argue, the nature of the matters over which the arguments occur are rather trivial. They should be resolved in a mature fashion between the partners, rather than placing the relationship in danger of ending, or even ending it ( or having a public spat about it ).
Longevity in relationships is usually ensured by mutual respect, and the willingness to indulge each other’s small flaws. The ability to “ look the other way” when a partner is doing something that annoys, and even to “not let the sun set on an argument.” There are no perfect people.
If one watches long term relationships ( like for instance grand parents or parents) one sees that basically, this is what they do. They indulge each other’s little flaws. This ensures that even arranged marriages survive.
So, perhaps this is one thing that the experiment of “Married at first sight” is showing to us.