Human relationships are subtle, and small things do count. A marriage failure could well have its origins in a crisis brought about from something as (seemingly) inconsequential as the matter of meals.
As in many things, timing is all important in conflict management. If allowed to fester for too long without being effectively managed, then the consequences are likely to be drastic (eg. War)
Then again there are those around who thrive on conflict, and have no desire to see it peacefully resolved.