You are right, but:
With such friends, enemies are no longer needed. If a dispute still comes, excellent knowledge of each other allows you to hit but painful points targeted. Half an hour of almost quiet conversation and you are no longer each other. There would be something in the beginning. Keep in mind, it happens.

I know, it happens. But if you really value each other, you will try not to bring it to that. If there is a major conflict (small everybody has), the chances of reconciliation are greater, because the conscience torments for its behavior.
For example, I am flammable like dust, and very ulcerative. Everyone, even the boss. Always on the roof. And with my husband, even if I am very angry, I put my long tongue in the tube, and out of the room, until I get out (well though, I leave very quickly), and I can't speak properly. Because if I tell him the ugliness in the flame, and I hurt, then I will bite myself. And he saves me the same way, I see. And it doesn’t matter whether we hit each other or not, we’t last for years.
Married life experience - 11 years, general dating experience - 14 years. I never regretted ever that I agreed to marry him. I never heard from him:"What hell I married!", although I am still a gift.
Happiness to you all! Sorry for the whole lecture.