The collective unconscious is said to be present in every person. If there is such a thing, it must have had an adaptive value for our species at some time in our evolutionary history, or else we would not have evolved the mechanism. If each person knew subconsciously how to relate to all other social types, that knowledge would serve to adapt them to their cultural environment. The frequency of aggressive behavior might be lower with a collective database than without one. Most people instinctively know how to relate to a pregnant woman or a nursing mother.
Most people seem to know how to relate to an aggressive warrior, or a very old man.
The human types represented in the collective database cover most of the people we will meet. If everybody were born with an instinctive knowledge of how to interact with almost everybody else, and if everybody had an instinctive grasp of their responsibilities and status in each phase of their life, human society possibly would have functioned more smoothly in it's early history. Divisions of labor would be largely automatic, and the society's ability to respond to threats quickly would be enhanced. When the call to man battle stations was heard, every person would know their place, and no energy or time would be needed to make decisions. The call to battle might only be called in the rare case of war or the presence of a dangerous predator, but in either case, knowing who will fight, and who needs protection, and responding accordingly could save lives.