Carelessness is an essential part of life as conflict. It is a moment of battle where important things are risked with instincts. This is only possible when one can abandon care of certain things of value. Taking care is building value, defenses, in a state of control that precedes and builds the foundations of lacking care. One who has not cared is not careless, he's buzzard food.
The work of a psychology of an uebermensch, which can be a single person, a family and even a race, is the work of building carelessness.
Philosophy is distinguishing. The christian philosopher only takes care, always shuns dance and battle into dark corners, and distinguishes precisely only in a state of perpetual caring. The philosopher of battle distinguishes the areas of caring and lacking care that feed battle instincts, which are largely the same as dance and exploration instincts and seek further material for caring and lacking care.